(anatomy) A sickle-shaped extension of the ethmoid bone that projects posteroinferiorly from the ethmoidal labyrinth and articulates with the inferior nasal conchae.

The problem that the meanings of symbols cannot be grounded, but require more symbols to explain them.

(biochemistry) An intermediate filament protein expressed by numerous cell types of the central nervous system.

(humorous) Of a play or a dramatic part: sufficiently good that it should be able to succeed even with an inferior cast.

Any source of protein that contains an adequate proportion of all of the essential amino acids necessary to the diet.

A small conductor attached to an insulated handle used to transfer electrical charge to a measuring instrument.

A proportion between two quantities, each of which is the product of two or more, those of the first set being in their order proportional to those of the other.

A former industrial process for producing nitrogen-based fertilizer.

The nitrogen fixation reaction of calcium carbide with nitrogen gas in a reactor vessel at about 1,000°C, producing nitrolim.

(surgery) proctosigmoidectomy