GLOSSARY 439 



Cen'trosome (xcVrpov, centre ; crw/xa, body), a body found at the centre of the aster 

 or attraction-sphere, regarded by some observers as the active centre of cell- 

 division and in this sense as the dynamic centre of the cell. Under its influence 

 arise the asters and spindle (amphiaster) _ of the mitotic figure. (BOVERI, 

 1888.) 



Cen'trosphere, used in this work as equivalent to the " astrosphere " of Stras- 

 burger ; the central mass of the aster from which the rays proceed and within 

 which lies the centrosome. The attraction-sphere. [STRASBURGER, 1892; 

 applied by him to the " astrosphere " and centrosome taken together.] 



Chloroplas'tids (xAwpo's, green ; TrAaoTo's, form), the green plastids or chlorophyll- 

 bodies of plant and animal cells. (SCHIMPER, 1883.) 



Chro'matin (xpw/xa, colour), the deeply staining substance of the nuclear network 

 and of the chromosomes, consisting of nuclein. (FLEMMING, 1879.) 



Chro'matophore (xpwtxa, colour; -<opos, bearing), a general term applied to the 

 coloured plastids of plant and animal cells, including chloroplastids and chromo- 

 plastids. (SCHAARSCHMIDT, i88o; SCHMITZ, 1882.) 



Chro'matoplasm (^pw/txa, colour; TrAaoyxa, anything formed or moulded), the sub- 

 stance of the chromoplastids and other plastids. (STRASBURGER, 1882.) 



Chro'miole, the smallest chromatin-granules which by their aggregation form the 

 larger chromomeres of which the chromosomes are composed. (EiSEN, 1899.) 



Chro'momere (xpui/xa, colour; /xepos, a part), one of the chromatin-granules of 

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

 See Chromiole. (FoL, 1891.) 



Chromoplas'tids (xpoi/xa, colour ; TrAaoros, form), the coloured plastids or pigment- 

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



Chro'moplasts, net-knots or chromatin-nucleoli ; also used by some authors as 

 equivalent to Chromoplastid. ( EISEN, 1899.) 



Chro'mosomes (xpui/xa, colour ; oxo/xa, 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 (/cvavos, blue ; <<Aeiv, to love), having an especial affinity for blue 

 or green dyes. (AUERBACH.) 



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

 aster. (FLEMMING, 1882.) 



[Cy'toblast] (KV'TOS, hollow (a cell); /SAacrrds, germ). i. The cell-nucleus. 

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

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

 or "protoblast." (KOLLIKER.) 



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

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



[Cytochyle'ma] (KVTOS, hollow (a cell) ; x^Aos 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) ; Swupeo-t?, division), the same as Mitosis. 

 (HENNEGUY, 1882,) 



Cytohy'aloplasma (KVTOS, hollow (a cell) ; vaAos, glass ; TrAaoyxa, anything formed), 

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

 opposed to nucleohyaloplasma. (STRASBURGER, 1882.) 



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

 substance. (HACKEL, 1891.) 



