zygodactylism (zigodaktilizm)

[ zygodactylous (zi-go-dak'ti-lus), a. [ Zygnema + -aceæ.] A very distinct order of fresh-water algæ, of the cla Conjugatæ. The individual consists of a usually simple and unbranched fila ment of cells placed end end, and the individuals are joined in filamentous families. The chlorophyl-ma is diffused or of a definite form, often forming a spiral band. Propagation is by means of zoospores which result from conjugation. See Conjugatæ, conjugation (with cut), and cut under chlorophyl. Zygnemeæ (zig-nēmē-ē), n. pl. [NL., develops into a germ-cell. zygobranch (zīgō-brangk), a. and n. [ chiæ.] I. a. Zygobranchiate. II. n. A zygobranchiate mollusk. Zygobranch i a (zī-gō-brang'ki-ä), n . pl . [NL.: see zygobranch .] Same as Zygobranch i at a . Zygobranch i at a (zī-gō-brang-ki-ā'tä), n. pl. [NL., neut. pl. of * zygobranch i at us : see zygobranchiate.] An order or suborder of Gas tropoda , having paired gill-combs, or right and left ctenidia, symmetrically disposed in the pallial chamber on each side of the neck, a pair IMG:content-2774.png:[blocks in formation] Zygogomphia (zī-go-gom'fi-ä), n. pl. [NL.,