Defn: Of or pertaining to the jaw. Gnathic index, in a skull, the ratio of the distance from the middle of the nasofrontal suture to the basion (taken equal to 100), to the distance from the basion to the middle of the front edge of the upper jaw; — called also alveolar index. Skulls with the gnathic index below 98 are orthognathous, from 98 to 103 mesognathous, and above 103 are prognathous. Flower.
GNATHIDIUM
Gna*thid"i*um, n.; pl. Gnathidia. Etym: [NL., fr. Gr. (Zoöl.)
Defn: The ramus of the lower jaw of a bird as far as it is naked; — commonly used in the plural.
GNATHITE
Gnath"ite, n. Etym: [Gr. (Zoöl.)
Defn: Any one of the mouth appendages of the Arthropoda. They are known as mandibles, maxillæ, and maxillipeds.
GNATHONIC; GNATHONICAL Gna*thon"ic, Gna*thon"ic*al, a. Etym: [L. Gnatho, name of a parasite in the "Eunuchus" of Terence, Gr.
Defn: Flattering; deceitful. [Obs.]
GNATHOPOD
Gnath"o*pod, n. Etym: [Gr. -pod.] (Zoöl.)
Defn: A gnathopodite or maxilliped. See Maxilliped.
GNATHOPODITE
Gna*thop"o*dite, n. (Zoöl,)