Cypoelft 



Cytodieresis 



Cyp'sela (kui^cAtj, a box), an acliene 

 invested by an adnate calyx, as the 

 fruit of Compositae. 

 Cyriodoch'ae {Kvpios, regular, as to 

 time, Soxrj, entertainment), em- 

 ployed by Clements to denote 

 regular successions of plants. 

 Cyr'rhus = Cirrhus, a tendril. 

 Cyst, Cyst'is (Kvans, a cavity), (1) a 

 sac or cavity, usually applied to a 

 structure whose nature is doubtful ; 

 (2) all cells of non-sexual origin in 

 green Algae which reproduce the 

 plant by gennination after a rest- 

 ing period as resting spores, hyp- 

 nospores, chronospores, aplano- 

 spores, akinetes (F. Gay) ; Cyst'a J, 

 Necker's term for a berry with dry, 

 membranous envelope, as in Passi- 

 flora; Cysticar'pium = Cystocarp ; 

 adj. cysticar'pic ; Cyst'id, a pro- 

 posed emendation for Cystid'ium; 

 (1) large, one-celled, sometimes in- 

 flated bodies, projecting beyond the 

 basidia and paraphyses of the hy- 

 raenium of Agarics, of unknown 

 function; (2) - Utricle; Cyst'o- 

 blast (jSAoo-tJ)?, a shoot), cited by 

 Crozier for Cytoblast; Cyst'ocarp 

 Cystocarp' ium {Kapirhs, fruit), a 

 sporophore in Algae, especially Flo- 

 rideae, a cyst containing sexually 

 produced spores; Cyst'olith {xldos, 

 stone), mineral concretions, usually 

 of calcium carbonate on a cellulose 

 stalk, occurring chiefly in special 

 cells of the Urticaceae, as in Ficus 

 elastica, Roxb. ; adj. cystolith'ic ; 

 Cyst'ophore {(popeu, I carry), the 

 same as Ascophore ; Cys'tosphere 

 {apdipa, a ball), masses of secretion 

 enclosed in a kind of sac or pouch ; 

 Cyst'osore Cystoso'ncs {a-wphs, a 

 heap), a group of resting-spores 

 within a cell as in Woronina ; 

 Cyst'ospore [ar-nooa., a seed) = Carpo- 

 SPOF.E (Strasburger) ; Cys'totyle 

 (tuAi7, a lump), nmcilaginous con- 

 cretions resembling Cystoliths, but 

 uncalcified and usually occurring in 

 pairs (Radlkofer) ; Cyst'ula = CisT- 

 ULA, Clstella. 

 Cy'tase {kvtos, a hollow vessel), an 



enzyme found in germinating seeds 

 which hydrolyses cellulose ; Cytas'- 

 ter (acT^p, a star), a series of achro- 

 matic rays from each pole of the 

 nucleus into the cytoplasm in 

 karyokinesis (Crozier); Cytench'yma 

 (^7Xy/ti«, an infusion), vacuolar 

 structure in cells, fluid which sepa- 

 rates from protoplasm as vacuoles 

 (Crozier) ; Cy'tioderm (Se^;ua, skin), 

 the cell-wall in Diatomaceae (Cro- 

 zier) ; Cytioder'ma, or Cy'toderm 

 (Sep/Ao, a skin), (1) the cell-wall; 

 (2) the outer layer of protoplasm 

 next the cell- wall, the primordial 

 utricle ; Cytioplas'ma {irKdafxa, 

 moulded), the cell-contents. 

 Cyt'isine, an alkaloid occurring in the 



genus Cytisus. 

 Cy'to-anat'omy {kvtos, a hollow vessel 

 -f Anatomy), the organisation of 

 the cell (Graf); Cytoast'er (+Astek), 

 a star in nuclear division ; cf. Dy- 

 ASTER ; Cy'toblast (jSAacrrbs, a 

 shoot), (1) Schleiden's name for the 

 cell-nucleus ; (2) a colony of bio- 

 blasts which have lost their inde- 

 pendent existence ; cf. Bioblast ; 

 Cytoblaste'ma, the formative ma- 

 terial in which cells are produced, 

 and by which they are held in union ; 

 protoplasm ; Oy'tochem'istry, the 

 chemistry of the cell (Graf) ; Cyto- 

 cho'rism {x^piCw, I separate), divi- 

 sion of living cells (Fitting) ; Cyto- 

 chyle'ma (x^Abs, juice), the contents 

 of the cell, composed of Plasmo- 

 CHYM, and Cy'tochym (x"i"«> that 

 which is poured), the more watery 

 sap present in the vacuoles of the 

 plant-cell (Strasburger) ; cytoclas'tic 

 (/cAao-rbs, broken in pieces), destruc- 

 tive of the cell ; Cytocoag'ulase 

 {coagiilo, I cause to curdle), an 

 enzyme in the caml)ium region of 

 Primus in autumn, which deposits 

 an insoluble product from gum 

 (Griiss); Cy'todes, (1) cells; (2) 

 nuclear elements in wliich the oaryo- 

 somes are not grouped into nuclei 

 (Vuillemin) ; Cy'toderm = Cytio- 

 DEiiMA , Cytodier'esis [hiaip^ais, di- 

 vision), cell-division with nuclear 



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