ZOO- 



353 



ZYG- 



zoophyte (z5'6flt) n, [Gk. ZOOM, 

 animal ;phyton, plant.] Any animal 

 resembling a plant in appearance 

 or growth. 



zooplankton (zo'oplang'kton) n. [Gk. 

 zoon, animal; plangktos, wander- 

 ing.] That part of the plankton 

 consisting of animals (biol.}. 



zooplasm (zo'dplazm) n. [Gk. zoon, an i- 

 mal ; plasma, something moulded.] 

 Living substance which depends on 

 the products of other living organ- 

 isms for nutritive material. 



zoosperm (zS'ospSrm) n. [Gk. zoon, 

 animal ; sperma, seed.] A sperma- 

 tozoon (zoo!.) ; a zoospore (dot.}. 



zoosporangium (zo'osporan'jium) n. 

 [Gk. zoon, animal ; sporos, seed ; 

 anggeion, vessel.] A sporangium 

 in which zoospores develop (hot.}. 



zoospore (zo'ospor) n. [Gk. zoon, 

 animal ; sporos, seed.] A swarm- 

 cell, flagellate or amoeboid, in 

 many Protozoa (zoo/.) ; a motile 

 protoplast in certain Algae (dot.}. 



zoothecium (zo'othe'sium, zo'pthe'- 

 shium) n. [Gk. zoon, animal ; 

 thekion, dim. of theke, case.] A 

 zoocytium. 



zoothome (zo'othom) n. [Gk. zoon, 

 animal ; thomos, heap.] Any group 

 of individuals in a living Coral 

 (zoo!.). 



zootomy (zoot'om!) n. [Gk. zoon, 

 animal ; temnein, to cut.] The 

 anatomy of animals other than 

 man (zoo I.). 



zooxanthellae (zo'ozantheTe) n. plu. 

 [Gk. zoon, animal ; xanthos, yellow.] 

 Yellow cells or symbiotic unicellular 

 Algae living in various Protozoa 

 (biol.). 



zooxanthin (zo'ozan'thin) n. [Gk. 

 zoon, animal ; xanthos, yellow.] 

 A yellow pigment found in the 

 plumage j>f certain Birds (zoo!.). 



zwischenkorper (tsvish'e'nkerpe'r) n. 

 [Ger. zwischen, between ; kbrper, 

 body.] A body or group of gran- 

 ules, probably comparable with the 

 cell-plate in plants, formed in the 

 equatorial region of the spindle 

 during the anaphases of mitosis 

 (cyt.). 



zygantrum (zlgan'trum) n. [Gk. 

 zygon, yoke ; antron, cave.] A 

 fossa on the posterior surface of 



the neural arch of the vertebrae of 

 Snakes and certain Lizards (zoo!.). 



zygapophysis (zl'gapof'TsIs) n. [Gk. 

 zygon, yoke ; apophysis, process of 

 a bone.] One of the processes of 

 a vertebra by which it articulates 

 with adjacent vertebrae (anat.}. 



zygobranchiate (zl'gobrang'kiat) a. 

 [Gk. zygon, yoke ; brangchia, gills.] 

 Having the gills symmetrically 

 placed and renal organs paired ; 

 appl. a group of Gastropods (zoo!.). 



zygocardiac (zl'gokar'diak) ossicles, 

 paired lateral ossicles in the gastric 

 mill of the Crayfish (zoo!.). 



zygodactyl (zl'godak'til) a. [Gk. 

 zygon, yoke ; daktylos, digit.] 

 Having two toes pointing forward, 

 two backward, as in parrots (zoo!.). 



zygodont (zfgodont) a. [Gk. zygon, 

 yoke ; odous, tooth.] Having molar 

 teeth in which the four tubercles 

 are united in pairs (zoo!.). 



zygoma (zlgo'ma) n. [Gk. zygoma, 

 yoke.] The bony arch of the cheek. 



zygomatic (zi'gomat'ik) a. [Gk. 

 zygoma, yoke.] Of or pert, the 

 zygoma (anat.). 



zygomaticofacial (zl'gomat'Tkofa'sIal) 

 a. [Gk. zygoma^ yoke ; L. fades, 

 face.] Appl. foramen on the malar 

 surface of zygomatic for passage of 

 nerve and vessels (anat.}. 



zygomaticotemporal (zl'gomat'lko- 

 tgm'poral) a. [Gk. zygoma, yoke ; 

 L. temporalis, temporary.] Appl. 

 suture, foramen, nerve, etc., at 

 temporal surface of zygomatic 

 (anat.). 



zygomorphic (zl'gomor'flk), zygomor- 

 phous (zl'gom&r'fus) a. [Gk. zygon, 

 yoke ; morphe, shape.] Bilaterally 

 symmetrical ; appl. irregular petal 

 arrangement (biol.). 



zygoneury (zl'gonu'ri) n. [Gk. zygon, 

 yoke ; neuron, nerve.] In certain 

 Gastropods, having a connective 

 between the pleural ganglion and 

 the ganglion on the visceral branch 

 of the opposite side (zoo!.). 



zygophore (zl'gofor) n. [Gk. zygon, 

 yoke ; pherein, to bear.] A conju- 

 gating hypha in certain Fungi (hot.}. 



zygophyte (zl'goflt) n. [Gk. zygon, 

 yoke ; phyton, plant.] A plant with 

 two similar reproductive cells which 

 unite in fertilization (bot.\ 



