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  • WordNet 3.6
    • n decametre a metric unit of length equal to ten meters
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Webster's Revised Unabridged Dictionary
    • n Decametre A measure of length in the metric system; ten meters, equal to about 393.7 inches.
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Chambers's Twentieth Century Dictionary
    • n Decametre dek′a-mēt-ėr a French measure of ten metres, or 32.8 feet.
    • ***


Webster's Revised Unabridged Dictionary
F. décamètre,; Gr. de`ka ten + mètre,. See Meter
Chambers's Twentieth Century Dictionary
Fr. décamètre—Gr. deka, ten, metron, a measure. See Metre.


In science:

CODALEMA is an experiment for observing electrical transients associated with cosmic rays and is located at the astronomical decametric antenna array at Nancay, France.
Radio Detection of Particles from the Cosmos
Low cost (MIDEXscale) free-space arrays to do decametric radio interferometry have already been proposed (e.g. the Astronomical Low Frequency Array – ALFA, and the Solar Imaging Radio Array – SIRA) as these wavelengths are blocked entirely by the ionosphere.
Does the Lunar Surface Still Offer Value As a Site for Astronomical Observatories?
Low frequency radio emission from solar system planets has been observed for decades and Jupiter (for example) is an extremely bright (though variable) source at decametric wavelengths.
Radio Emission from Exoplanets
In any event, it should be borne in mind that all existing estimates of cyclotron maser decametric emission are based on a host of unknowns, e.g., stellar winds, coronal density, and stellar and planetary magnetic fields.
GMRT search for 150 MHz radio emission from the transiting extrasolar planets HD189733b and HD209458b