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equatorial

Definitions

  • WordNet 3.6
    • adj equatorial of or existing at or near the geographic equator "equatorial Africa"
    • adj equatorial of or relating to conditions at the geographical equator "equatorial heat"
    • adj equatorial of or relating to or at an equator "equatorial diameter"
    • n equatorial a telescope whose mounting has only two axes of motion, one parallel to the Earth's axis and the other one at right angles to it
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The equatorial bulge of the earth does not rest along the equator. The highest point of the bulge is actually located 25 feet to the south.
    • n Equatorial (Astron) An instrument consisting of a telescope so mounted as to have two axes of motion at right angles to each other, one of them parallel to the axis of the earth, and each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed, even in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockwork, so as to keep the object constantly in the field of the telescope. Called also an equatorial telescope.☞ The term equatorial, or equatorial instrument, is sometimes applied to any astronomical instrument which has its principal axis of rotation parallel to the axis of the earth.
    • a Equatorial Of or pertaining to the equator; as, equatorial climates; also, pertaining to an equatorial instrument.
    • ***
Century Dictionary and Cyclopedia
    • equatorial Of or pertaining to the equator: as, equatorial climates; the equatorial diameter of the earth is longer than the polar diameter.
    • n equatorial An astronomical instrument contrived for the purpose of directing a telescope upon any celestial object of which the right ascension and declination are known, and of keeping the object in view for any length of time notwithstanding the diurnal motion. For these purposes a principal axis resting on firm supports is placed parallel to the axis of the earth's rotation, and consequently pointing to the poles of the heavens. On this polar axis there is placed, usually near one of its extremities, a graduated circle, the plane of which is perpendicular to the polar axis, and therefore parallel to the equator. This circle is called the equatorial circle, and measures by its arcs the hour-angles, or differences of right ascension. The polar axis carries a second circle, called the declination circle, the plane of which is at right angles to that of the equatorial circle. This last circle has a telescope attached to it for making observations, which moves along with it in the same plane. The name equatorial, or equatorial instrument, is sometimes given to any astronomical instrument which has its principal axis of rotation parallel to the axis of the earth.
    • equatorial In crystallog., of or pertaining to the horizontal or lateral plane.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Equatorial of or pertaining to the equator
    • ***

Etymology

Webster's Revised Unabridged Dictionary
Cf. F. équatorial,
Chambers's Twentieth Century Dictionary
L. æqualisæquāre, to make equal—æquus, equal.

Usage

In literature:

You see, we picked this limb out of the Equatorial current.
"To Choke an Ocean" by Jesse F. (Jesse Franklin) Bone
There exist upon the ocean three regions of fogs, one equatorial and two polar.
"Toilers of the Sea" by Victor Hugo
Another woman gave a lecture this year upon her travels in Equatorial Africa, Miss Jessie T. Ackerman.
"The Story of Chautauqua" by Jesse Lyman Hurlbut
Rarely on the tableland of Equatorial Africa do we see the scrub and thorn trees of South Africa.
"Through South Africa" by Henry M. Stanley
Sharks are abundant in equatorial waters, and they follow ships for miles.
"Harper's Round Table, October 29, 1895" by Various
The general absence of erratics in the warmer parts of the equatorial regions of Asia, Africa, and America, confirms the same views.
"Principles of Geology" by Charles Lyell
Equatorial Africa in a most striking degree is just now such a battle-ground.
"The Call of the World" by W. E. Doughty
Gorgeous varieties of equatorial regions.
"Woman's Club Work and Programs" by Caroline French Benton
The garments were a trifle short at the extremities, but they more than made up for the lack equatorially.
"A Romance in Transit" by Francis Lynde
They lie at the northern limit of the equatorial belt, and for a period of two months only (July and August), are supplied with rain.
"The Philosophy of the Weather" by Thomas Belden Butler
Its equatorial zone was one vast, featureless belt of darkish-gray.
"The Secret of the Ninth Planet" by Donald Allen Wollheim
It was a thing done in daring colors and almost blazing with the glare of an equatorial sun.
"The Key to Yesterday" by Charles Neville Buck
This observation applies equally to the equatorial plane in natural karyokinesis, whose existence is thus readily explained.
"The Mechanism of Life" by Stéphane Leduc
He will set like an equatorial sun, and there will be no twilight over his memory.
"Wilson's Tales of the Borders and of Scotland" by Various
It tries to tilt the equatorial part of the earth into the plane of the moon's orbit.
"Spinning Tops" by John Perry
The whole is mounted as an equatorial upon a strong cast-iron stand.
"The Life of Roger Langdon" by Roger Langdon
The equatorial zone is therefore the true school for the historian of life in its more universal and lasting aspects.
"Charles Darwin" by Grant Allen
She is at once in the equatorial calm-belt, and under the Equatorial Cloud Ring.
"Memoirs of Service Afloat, During the War Between the States" by Raphael Semmes
More recent work points to an elliptical equatorial section, thus making the earth pear-shaped.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 9" by Various
She accordingly resolved to undertake a journey to the equatorial regions of South America.
"Woman in Science" by John Augustine Zahm
***

In poetry:

There the systems, we call solar,
Equatorial and polar,
Write their lines of rushing light
On the awful leaves of night.
"Processional" by Madison Julius Cawein
Through the long nights I see thee ever waking,
Thy footstool earth, thy roof the hemisphere,
While with thy griefs our weaker hearts are aching,
Firm as thine equatorial's rock-based pier.
"A Welcome To Dr. Benjamin Apthorp Gould" by Oliver Wendell Holmes
And there the palms, the talipot with its lofty blossom-spire,
The cocoanut and the slim areca listening await
What sorceries of his trembling rays of equatorial fire
Will next be laid upon some lesser mate.
"In A Tropical Garden" by Cale Young Rice
It's here and there and everywhere, an unexpected guest,
That is not always welcome, be its manners of the best;
You'll meet it in the Baltic and again in Riga Bay,
Or landing with its guns in Equatorial Africa.
"The Silent Navy" by Cicely Fox Smith

In news:

The Sooty Tern uses its body to cast a shadow in order to protect its young chick from the blazing equatorial sun.
Hi this is Genevieve Johnson talking to you from Kiribati in the central equatorial pacific.
A BAE Systems Regional Aircraft regional jet is flying over Asia to improve understanding of how equatorial rain forests influence climate change.
Equatorial Guinea Holds Inaugural Labor Conference.
Plankton from equatorial waters found in the Arctic Ocean in 2010, from left to right: Dictyocoryne truncatum and Didymocyrtis tetrathalamus.
Scattering the dust of a common, semiprecious metal across equatorial soils may sponge carbon dioxide from the atmosphere and slow the pace of climate change.
While cruising the Galapagos Islands back in June, I had several opportunities to snorkel in surprising cool equatorial waters.
Plankton from equatorial waters found in the Arctic Ocean in 2010, from left to right: Dictyocoryne truncatum and Didymocyrtis tetrathalamus.
Scientists found that a major fraction of the massive stars form by collecting matter onto disks around their equatorial regions.
Here is a small Andean mountain village basking under the equatorial sun in a green valley 8,000 feet above sea level between two extinct volcanoes in northern Ecuador.
African-American -Equaguinean's celebrate their nationality at 44th Anniversary of Equatorial Guinea.
Equatorial Guinea's President Teodoro Obiang Nguema Mbasogo is seen following in Lisbon, Friday, July 25, 2008.
The Washington-based Equatorial Guinea Justice sent their letter in February, while the New York-based Human Rights Foundation sent theirs on Friday.
President of Equatorial Guinea since 1979Born: 5 June 1942.
Fripp & Eno: The Equatorial.
***

In science:

This condition is valid on the equatorial plane.
Quintessence-like Dark Matter in Spiral Galaxies
In that case it is reasonable to suppose that the flat curve condition (9) is valid in a region around the equatorial plane.
Quintessence-like Dark Matter in Spiral Galaxies
The polar and equatorial circumferences for a moving black hole are practically the same, i.e. the symmetry of the horizon is close to spherical symmetry.
Local and global properties of conformally flat initial data for black hole collisions
As generally expected the radiation is predominated by an l = 2, m = 2, s = −2 spin-weighted spherical harmonic angular distribution so that that the intensity is 16 times greater along the axes than in the equatorial plane.
Modeling gravitational radiation from coalescing binary black holes
Bekki & Freeman (2002) also explored the effects of tilting the gas disk away from the equatorial plane of the halo.
On the Spiral Structure of NGC 2915 and Dark Matter
NGC 2915 does not lie in the equatorial plane of a more massive, thicker stellar disk, the expression of Qcrit is different from that of standard galactic gaseous disks.
On the Spiral Structure of NGC 2915 and Dark Matter
These results suggest that the equilibrium of a flux ring located in the equatorial plane is stable with respect to small amplitude, radial displacements from the position given by equation (16).
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
For the conditions considered in the present paper, the perturbed force balance is such that a ring initially contained within the equatorial plane moves over time to higher latitudes and larger radii.
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
Once out of the equatorial plane, the dynamics of such a ring is found to be identical to that of one with θ0 < π/2, and is discussed in §3.2 below.
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
At later times, this moment arm length approaches its initial size, while the height r cos θ of the ring above the equatorial plane steadily increases.
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
Such a situation is in contrast to the dynamical and thermodynamical evolution observed previously for flux rings in the equatorial plane.
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
The stationary equilibrium of an equatorial flux ring is characterized by T = Te, a vanishing radiative heating rate, and a balance between buoyancy and the sum of the Coriolis and tension forces (see Figures and ).
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
Similar to the equatorial flux rings that were the sub ject of that section, in the present case, these reductions are responsible for engendering oscillatory motion of the tube during the early stages of its ascent toward the surface.
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
On the expanded scale of panel (B), it is seen that for a time ≈ 0.25 tA following the start of the calculation, the ring moves steadily toward the pole, and thereafter executes latitudinal oscillations that decrease in amplitude as the distance of the ring from the equatorial plane increases.
Magnetic Fields in Massive Stars. II. The Buoyant Rise of Magnetic Flux Tubes Through the Radiative Interior
The wedge is placed around the equatorial plane of the spherical coordinate grid.
Explosion Mechanisms of Massive Stars
***