440 GLOSSARY 



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

 nucleomicrosomes. (SxRASBURGER, 1882.) 



Cytomi'tome (KVTOS, hollow (a cell) ; /u'rw/xa, from /W'TOS, thread), the cytoplasmic 

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



Cy'toplasm (KITTOS, TrAacr/xa). I. The protoplasmic ground-substance as opposed 

 to the granules. (KOLLIKER, 1863.) 2. Equivalent to protoplasm. (KOLLIKER, 

 1867.) 3. The substance of the cell-body as opposed to that of the nucleus. 

 (STRASBURGER, 1882.) 



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



Cy'tosome (KUTOS, hollow (a cell) ; cru>/x,a, body). I. The cell-body or cytoplasmic 

 mass as opposed to the nucleus. (HACKEL, 1891.) 2. A term used as parallel to 

 chromosome to denote deeply staining definitely organized cytoplasmic filaments 

 or other cytoplasmic structures composed of "cytochromatin." (PRENANT, 1898.) 



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

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



Der'matosomes (8e'p/xa ? skin ; aw/xa, body), the plasomes which form the cell-mem- 

 brane. (WlESNER, 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] (SeuV(epos), second ; see Hyalosome), the nucleus remaining 

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



Deu'toplasm (SeuV(epos), second ; TrAaoyxa, anything formed), yolk, lifeless food- 

 matters deposited in the cytoplasm of the egg; opposed to "protoplasm. 1 ' (VAN 

 BENEDEN, 1870.) 



Diakine'sis (Sta, through), the segmented-spireme-stage, following the synapsis, in 

 the primary oocyte or spermatocyte, during which the chromosomes'persist for a 

 considerable period in the form of double rods. (HACKER, 1897.) 



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



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



Dispermy, the entrance of two spermatozoa into the egg. 



Dispi'reme (see Spireme), that stage of mitosis in which each daughter-nucleus 

 has given rise to a spireme. (FLEMMING, 1882.) 



Dy'aster (Suas, two; see Aster, 2), the double group of chromosomes during the 

 anaphases of cell-division. (FLEMMING, 1882.) 



Ectosphere (CKTOS, outside), the outer or cortical zone of the attraction-sphere. 

 (ZIEGLER, 1899.) 



Egg-nucleus, the nucleus of the egg after formation of the polar bodies and before 

 its union with the sperm-nucleus. Equivalent to the "female pronucleus " of VAN 

 BENEDEN. (O. HERTWIG, 1875.) 



Enchyle'ma (ev, in; x v/ ^ s > juice). I. The more fluid portion of protoplasm, 

 consisting of " hyaloplasma." (HANSTEIN, 1880.) 2. The ground-substance 

 (cytolymph) of cytoplasm as opposed to the reticulum. (CARNOY, 1883.) 



Endoplast, the cell-nucleus. (HUXLEY, 1853.) 



Ener'gid, the cell-nucleus together with the cytoplasm lying within its sphere of 

 influence. (SACHS, 1892.) 



Entosphere, (evros, inside), the inner or medullary zone of the attraction-sphere. 

 ( ZIEGLER, 1899.) 



Equatorial plate, the group of chromosomes lying at the equator of the spindle 

 during mitosis. (VAN BENEDEN, 1875.) 



Ergastic (epyao/xcu, to work). Applied to relatively passive substances "formed 

 anew through activity of the protoplasm.' 1 Equivalent to metaplasmic. Cf. 

 alloplasmatic. (A. MEYER, 1896.) 



