Fe-nes´tra (L.). Literally, a window; the opening between the middle and internal ear.

Fi´brin (L. fi´bra, a fibre). An albuminoid substance found in the blood; in coagulating it assumes a fibrous form.

Flex´ion (L. flec´to, to bend). The act of bending a limb, etc.

Fol´li-cle (L. dim. of fol´lis, a bag). A little pouch or depression in a membrane; it has generally a secretory function.

Fun´gous Growths (L. fun´gus, a mushroom). A low grade of vegetable life.

Gan´gli-on (Gr. γαγγλίον, ganglion, a knot). A knot-like swelling in the course of a nerve; a smaller nerve-centre.

Gas´tric (Gr. γαστήρ, gaster, stomach). Pertaining to the stomach.

Gland (L. glans, an acorn). An organ consisting of follicles and ducts, with numerous blood-vessels interwoven; it separates some particular fluid from the blood.

Glos´so-phar-yn-ge´al Nerve (Gr. γλῶσσα, glossa, the tongue, and φάρυγξ, pharunx, the throat). The nerve of taste supplying the posterior third of the tongue; it also supplies the throat.

Glu´ten (L.). Literally, glue: the glutinous albuminoid ingredient of wheat.