Gy'rōg'o-nīte, n.

noun

n. [Fr. gyrogonite; Gr. γῦρος, circle, ring, and γένεσιν, γίνεσθαι, to beget, bring forth.] (Paleon.) The fossil seed of the Chara, a plant found in ponds and ditches;—once supposed to be a shell. Lyell.