The eye contains three agents: The optic or visual, the palpebral or pupil, and the eyebrow agent.
"Delsarte System of Oratory" by Various
Associated Words: palpebral, palpebrate.
"Putnam's Word Book" by Louis A. Flemming
The palpebral fissure was normal in size and there was little, if any, diminution in strength of the right radial pulse.
"Surgical Experiences in South Africa, 1899-1900" by George Henry Makins
It is about the size of an almond and has an upper (orbital) and a lower (palpebral) part.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1" by Various
This muscle determines the narrowing and closure of the palpebral orifice.
"Artistic Anatomy of Animals" by Édouard Cuyer