ZYGOSPERM
Zyg"o*sperm, n. Etym: [Gr. sperm.] (Bot.)
Defn: A spore formed by the union of the contents of two similar cells, either of the same or of distinct individual plants. Zygosperms are found in certain orders of algæ and fungi.
ZYGOSPHENE
Zyg"o*sphene, n. Etym: [Gr. (Anat.)
Defn: A median process on the front part of the neural arch of the vertebræ of most snakes and some lizards, which fits into a fossa, called the zygantrum, on the back part of the arch in front.
ZYGOSPORE Zyg"o*spore, n. Etym: [Gr. spore.] (Bot.) (a) Same as Zygosperm. (b) A spore formed by the union of several zoöspores; — called also zygozoöspore.
ZYLONITE
Zy"lon*ite, n. Etym: [Gr.
Defn: Celluloid.
ZYMASE
Zym"ase, n. Etym: [From Zyme.] (Physiol. Chem.)
Defn: A soluble ferment, or enzyme. See Enzyme.
ZYME
Zyme, n. Etym: [Gr.