APPENDIX III 369 



FENESTRA (L. window), any window-like opening; the diapsid reptiles 



have two fenestrae in the roof of the skull. 

 FERO (L. to carry or bear), suffix in afferent, efferent. 



FiLUM (L. a thread), combining form; filiform, filoplume, filum terminale. 

 FLOCCULUS (L. floccus, a piece of wool), the lateral outgrowths on either 



side of the cerebellum. 

 FOLLICLE (L. jolliculus, diminutive of jollis, a bag), any minute cavity, 



sac or tube; as, the follicle from which a hair grows. 

 FONTANEL (L. diminutive of jons, a fountain), an unossified area in the 



embr^-onic or infant skull; the space where four dermal bones have 



not met. 

 FORAMEN (L. an opening, from joro, to bore through), an opening through 



a membrane or bone; the foramen ovale in the embryonic auricular 



septum; or, the foramina of the skull. 

 FOSSA (L. fossus, dug out), a shallow pit or depression; the fossae of the 



scapula; the temporal fossa; or the endoh^mphatic fossa. 

 FRONTAL (L, irons, the brow), pertaining to the forehead. 

 FUNDUS (L. bottom),' the bottom or basal part; the rounded bottom of 



a hollow organ; the fundus of the stomach. 



GANGLION (G. a tumor), a group of nerve cells, set off to themselves, serv- 

 ing as a center of nervous influence. 

 GANOID (G. ganos, bright, plus eidos, like), a shiny substance found in 



the scales of certain fish; the ganoid fishes include widely different 



forms, the Chondrostei, Holostei, and Crossopterj-gii. 

 GASTER (G. stomach), as combining form (gastro, gastero) referring to the 



stomach; gastric, mesogaster, etc. 

 GASTRULA (L. diminutive of gaster), an embryo at the stage when two 



germ layers are present, endoderm and ectoderm, formed by gastrula- 



tion. 

 GENITAL (L. genitalis, from gigno, to beget) pertaining to the reproductive 



organs; genital papilla, 

 GENUS (L. origin), a division in classification, a more coherent group 



than a famih-, but more diverse than a species. Generic names are 



capitalized : Homo sapiens. 

 GERM (L. germen, a sprig; germino, to sprout), a germ cell; in combining 



forms, a primary source. 

 GERMiNATivuM (L. germhio) , the basal ectodermal layer of the skin in 



which growth proceeds. 

 CLANS (L. acorn), the rounded end of the clitoris or penis, derived from 



the genital papilla. 

 GLOMERULUS (L. a ball of yarn), an agglomeration of vessels forming a 



rounded mass; specifically, the coiled vessel of a renal corpuscle. 

 GLOSSA (G. tongue), a combining form; glossopharyngeal, Balanoglossus, 



hypoglossal. 

 GLOTTIS (G. glotta, tongue), the opening from the pharynx into the 



trachea. 

 GNATHOS (G. jaw), a combining form; agnathous, Gnathostome. 

 Gnathostomata (G. gnathos, plus stoma, mouth), vertebrates with jaws; 



distinguished from the Agnathostomata or cyclostomes. 

 G0N.\D (G. gonos, seed), a reproductive gland, either testis or ovary. 



