GLOSSARY 335 



Chro'momere (xpoSjaa, colour; /xepos, a part), the individual chromatin-granules of 

 which the chromosomes are made up. Identified by WEISMANN as the "id." 

 (FoL, 1891.) 



Chromoplas'tids (xpiofjia, colour ; TrAaoTos, form), the coloured plastids or pigment- 

 bodies other than the chloroplasts, in plant-cells. (SCHIMPER, 1883.) 



Chro'mosomes (xpwjua, colour ; crw/ixa, body), the deeply staining bodies into which 

 the chromatic nuclear network resolves itself during mitotic cell-division. (WAL- 



DEYER, 1888.) 



Cleavage-nucleus, the nucleus of the fertilized egg, resulting from the union of 

 egg-nucleus and sperm-nucleus. (O. HERTWIG, 1875.) 



Cortical zone, the outer zone of the centrosphere. (VAN BENEDEN, 1887.) 



Cyano'philous (KWJ/OS, blue; <iAeV, to love), having an especial affinity for blue 

 or green dyes. (AUERBACH.) 



Cy 'taster (KVTOS, hollow (a cell); dcrrrj/a, star), the same as Aster, i. See Kary- 

 aster. (FLEMMING, 1882.) 



[Cy'toblast] (/euros, hollow (a cell); /?Aao-Tos, germ), i. The cell-nucleus. 

 (SCHLEIDEN, 1838.) 2. One of the hypothetical ultimate vital units (bioblasts or 

 u granula") of which the cell is built up. (ALTMANN, 1890.) 3. A naked cell 

 or u protoblast.'' (KOLLIKER.) 



[Cytoblaste'ma] (see Cytoblast), the formative material from which cells were 

 supposed to arise by "free cell-formation." (SCHLEIDEN, 1838.) 



Cytochyle'ma (KUTOS, hollow (a cell) ; ^i;Ad?, juice), the ground-substance of the 

 cytoplasm as opposed to that of the nucleus. (STRASBURGER, 1882.) 



Cy'tode (KVTOS, hollow (a cell) ; etSos, form), a non-nucleated cell. (HACKEL, 1866.) 



Cytodie'resis (KVTOS, hollow (a cell) ; Siatpetris, division), the same as Mitosis. 

 (CARNOY, 1885.) 



Cytohy'aloplasma (KUTOS, hollow (a cell) ; voAos, glass ; TrAaoyxa, anything formed), 

 the substance of the cytoreticulum in which are embedded the microsomes ; 

 opposed to nucleohyaloplasma. (STRASBURGER, 1882.) 



Cy'tolymph (KUTOS, hollow (a cell) ; lympha* clear water), the cytoplasmic ground- 

 substance. (HACKEL, 1891.) 



Cytomi'crosomes (see Microsome), microsomes of the cytoplasm; opposed 

 to nucleomicrosomes. (STRASBURGER, 1882.) 



Cytomi'tome (KU'TO?, hollow (a cell) ; /u.tra>/ua, from /XI'TOS, thread), the cytoplasmic 

 as opposed to the nuclear thread-work. (FLEMMING, 1882.) 



Cytoretic'ulum, the same as Cytomitome. (STRASBURGER, 1882.) 



Cy'tosome (KUTOS, hollow (a cell) ; crw/xa, body,) the cell-body or cytoplasmic 

 mass as opposed to the nucleus. (HACKEL, 1891.) 



Der'matoplasm (Se'p/xa, skin), the living protoplasm asserted to form a part of the 

 cell-membrane in plants. (WIESNER, 1886.) 



Der'matosomes (Se'p/xa, skin ; <ra>/xa, body), the plasomes which form the cell-mem- 

 brane. ( WIESNER, 1886,) 



Determinant, a hypothetical unit formed as an aggregation of biophores, determin- 

 ing the development of a single cell -or independently variable group of cells. 

 (WEISMANN, 1891.) 



[Deuthy'alosome] (Seur(epos), second ; see Hyalosome), the nucleus remaining 

 in the egg after formation of the first polar body. (VAN BENEDEN, 1883.) 



Deu'toplasm (8eijr(epos), second ; TrAaa/xa, anything formed), yolk, lifeless food- 

 matters deposited in the cytoplasm of the egg ; opposed to " protoplasm." (VAN 

 BENEDEN, 1870.) 



Directive bodies, the polar bodies. (FR. MULLER, 1848.) 



Directive sphere, the attraction-sphere. (GuiGNARD, 1891.) 



Dispermy, the entrance of two spermatozoa into the egg. 



