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The table; hence, the pleasures of the table; food. It could be no ordinary declension of nature that could bring some men, after an ingenuous education, to place their "summum bonum" upon their trenchers. South. Trencher cap, the cap worn by studens at Oxford and Cambridge Universities, having a stiff, flat, square ap…

Change of termination of words, as in declension, conjugation, derivation, etc.

The reciprocal of the focal distance of a lens, used as measure of the divergence or convergence of a pencil of rays. [R.] Humphrey Lloyd.

ected vision, or Refracted vision, vision by rays reflected from mirrors, or refracted by lenses or prisms, respectively. -- Vision purple. (Physiol.) See Visual purple, under Visual.

One of the transparent lenslike cells in the ocelli of certain arthropods.

; resembling a vulture in qualities or looks; as, the vulturine sea eagle (Gypohierax Angolensis); vulturine rapacity. The vulturine nose, which smells nothing but corruption, is no credit to its possessor. C. Kingsley.

Decline; failure; diminution; decrease; declension. An age in which the church is in its wane. South. Though the year be on the wane. Keble.

Having or covering an angle wider than the ordinary; -- applied to certain lenses of relatively short focus. Lenses for ordinary purposes have an angle of 50º or less. Wide-angle lenses may cover as much as 100º and are useful for photographing at short range, but the pictures appear distorted.

A magnifying glass consisting of two plano-convex lenses. It is designed to correct spherical aberration and chromatic dispersion.