Flex´or, n. Generic name of a muscle that bends a limb or any of its segments.
Flexu´ra (alæ), n. Bend of the wing; carpal angle; salient angle or prominence formed at the wrist when the wing is folded. (77.)
Flex´ure, n. See Flexura.
Floc´culent, a. Pertaining to the peculiar down of newly hatched or unfledged young birds. (Not used in ornithology in its common sense of flaky.)
Floc´cus, n. A peculiar kind of plumage of simple structure (generally downy), found in unfledged birds, at first growing directly from the skin, afterwards for the most part affixed to the tip of the true feather, of which it is the precursor, or rather the first-formed part; and finally falling off. In psilopædic birds the floccus is only associated with the true plumage, sprouting from the future pterylæ alone; in ptilopædic birds it also sprouts from the apteria, and in so far is unconnected with future plumage; the whole body is in such cases densely clothed. (Sundevall.)
Fϫtus, n. Same as Fetus (which see).
Fol´licle, n. Minute secretory sac.
Follic´ular, Follic´ulate, a. Having follicles; composed of follicles.
Foot, n. (112.) See Pes.