Yeast 



Zoomorphosls 



Yeast, pr. yeest, the minute uni- 

 cellular organisms which effect 

 alcoholic fermentation in sugary 

 liquids ; ~ Bud'ding, giving rise to 

 similar yeast-gonidia ; ~ Fun'gus, 

 SaccharomycesCerevisiae, J. Meyer; 

 sometimes termed SPROUTING 

 FUNGUS : Bot'tom ~ , Low ~ , 

 that which forms at the bottom 

 of the vats, ' ' Unterhef e " of the 

 Germans; Up'per ~, or Barm, 

 that which floats on the surface, 

 the German " Oberhefe " ; wild ~, 

 some undesired form, which gives 

 a bitter taste to the wort without 

 fermentation. 



Yponme'ma (71-6, under, /t&w, I 

 remain), Necker's term for an 

 inferior calyx. 



Zan'thophyll = XANTHOPHYLL. 

 Ze'Sn, a proteid existing in maize, 



Zea Mays, Linn. 

 Zeuot'ropism (zenith, T/SOTTT/, a 



twining), negative geotropism 



(Fayod) ; adj. zenotroplc. 

 zeori'nus, resembling the Lichen 



genus Zeora, Fr. 

 Zi'mome = ZYMOME. 

 zig'zag, having short bends or angles 



from side to side. 

 Zoadu'la, pi. Zoadulae (Fr. zoadule), 



Gaillon's term for ZOOSPORB. 



zodioph'ilous (fwdiov, a little animal, 



0l\e'w, I love) = ZOIDIOPHILOUS. 



zoidiog'amus (foov, an animal, ydfj.os, 

 marriage), Engler and Prantl's 

 term when an archegoniate plant 

 has ciliated antherozoids ; zoidio- 

 ph'ilous (0i\cw, I love), pollinated 

 by the agency of animals ; Zoidio- 

 ph'ilae, plants which are so fertil- 

 ized. 



zo'nal (tyvri, a belt or girdle), applied 

 to those "plant-formations " by C. 

 Macmillan, which exhibit well 

 marked radial symmetry as 

 though spreading from one centre ; 

 zo'nate, marked circularly, as the 

 leaves of Pelargonium zonale, 

 L'He'rit. ; ~ Tetragonid'ia, those 

 formed by transverse divisions ; 

 </. CRUCIATE ; Zone, the connection 



between two valves of a Diatom ; 

 the hoop or girdle ; ~ of Distribu'- 

 tion, in Great Britain, altitudes of 

 plant growth as defined by H. C. 

 Watson ; divided into in'fer-, mid-, 

 and su'per- ; cf. REGION ; Zona'tion, 

 the formation of a hollow sphere 

 by the nucleus in metaphasis, with 

 a film of granulated protoplasm 

 which marks the boundary of the 

 compound oosphere in Oystopua 

 Bliti, De Bary (F. L. Stevens). 

 Zo'ocarp (ffov, an animal, Kapiros, 

 fruit) = ZOOSPORE; Zoocecid'ia 

 (icrjids, a gall), plant-galls produced 

 by animals (Tubeuf) ; Zoocoe'no- 

 cyte ( + COENOCYTE), a free-swim- 

 ming coenocyte ; Zo'ocyst (*u<ms, 

 a bag), a cyst, which, in Mona- 

 dineae, gives rise to ciliated or 

 amoeboid zoogonidia ; Zoodomat'ia, 

 (Sw/xdrtov, a small house), shelters 

 formed by a plant for those animals 

 which are of benefit to it ; Zoo- 

 g'amae (yd/j.o$, marriage), plants 

 with motile reproductive elements, 

 Cryptogams ; Zo'ogamete (ya/ifn/s, 

 a spouse), = PLANOGAMETE ; Zoo- 

 g'amy, applied to plants having 

 motile sexual elements, as most 

 Cryptogams ; Zoogloe'a (y\oibs, 

 viscous, clammy), a stage of 

 Schizomycetes when they are em- 

 bedded in a jelly-like substance ; 

 Zoogonan'gia (ydvos, offspring, 

 dyyeiov, a vessel), certain cells in 

 Ctenocladus, which enlarge, become 

 pear-shaped, and hibernate, after- 

 wards producing planogametes 

 (Borzl) ; Zoogonidan'gium ( + 

 GONIDANGIUM), employed by W. 

 West for an organ in certain 

 Algae which produces zoospores ; 

 Zoogonid'ium ( + GONIDIUM) = ZOO- 

 SPORE ; Zo'oid (elSos, resemblance), 

 a motile spore or gamete (Hazen) ; 

 zooidiog'amous (ydfj.os, marriage), 

 used of gametes when at least one 

 is actively motile, flagellate, 

 ciliate, or amoeboid (Hartog) ; 

 Zoomorph'osis (/^/a^axns, a shap- 

 ing), changes produced in plants 

 from the action of animals ; used 



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