Defn: Producing geodes; containing geodes.

GEODUCK
Ge"o*duck, n. Etym: [American Indian name.] (Zoöl.)

Defn: A gigantic clam (Glycimeris generosa) of the Pacific coast of
North America, highly valued as an article of food.

GEOGNOSIS
Ge`og*no"sis, n. Etym: [See Geognosy.]

Defn: Knowledge of the earth. [R.] G. Eliot.

GEOGNOST
Ge"og*nost, n. Etym: [Cf. F. géognoste.]

Defn: One versed in geognosy; a geologist. [R.]

GEOGNOSTIC; GEOGNOSTICAL
Ge`og*nos"tic, Ge`og*nos"tic*al, a. Etym: [Cf. F. géognostique.]

Defn: Of or pertaining to geognosy, or to a knowledge of the structure of the earth; geological. [R.]

GEOGNOSY
Ge*og"no*sy, n. Etym: [Gr. géognosie.]