440 GLOSSAKY 



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



nuclcomiciosoines. (STKAslsiKCiliK. 1882.) 

 Cytonii'tome (ki'tos. hollow (a ceil) : fiiTwfxa, from fx.LTo<;. thread), the cytoplasmic 



as oii]iosed to the nuclear thread-work. (Flkmming, 1882.) 

 Cy'toplasm (kitos, Trkaajxa). I. The protoplasmic ground-substance as opposed 



to the granules. (Kollikkr. 1863. ) 2. Equivalent to protoplasm. (Koi.liker. 



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



(STKASHllUiKK, 1882.) 



Cytoretic uluni. the same as Cytomitome. (.Strasburger. 1882.) 



Cy'tosome (^ciVos. hollow (a cell) : awfxu. body), i. The cell-body or cytoplasmic 

 mass as opposed to the nucleus. (H.\cki-:l. 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 (Sepfxu. skin), the living protoplasm asserted to form a, part of the 

 cell-membrane in plants. (Wiesner, 1S86.) 



Derniatosomes {Sip/jLu. skin ; (7ai/u.a, body), the plasomes which form the cell-mem- 

 brane. (WiES.N'ER. 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. 

 (Weis.maxx, 1 891.) 



[Deuthy'alosome] (8ei'T(epo?). second: see Hyalosome). the nucleus remaining 

 in the egg after formation of the first polar body. (Van* Bexedex. 1883.) 



Deu'toplasm ( Sei'T( epos), second : irXacrfxa. anything formed), yolk, lifele.ss food- 

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

 Bexedex. 1870.) * 



Diakine'sis (5ta. 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. (Guigxard, 1891.) 



Disperniy, 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. (Flemmixg, 1882.) 



Dy'aster (Sras. two: see Aster. 2), the double group of chromosomes during the 

 anaphases of cell-division. (Flemmixg. 1882.) 



Ectosphere (eVros, 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 Vax 

 Bexedex. (O. Hertwig, 1875.) 



Enchyle'ma (ev, in: ;!^t'Aos. juice), i. The more fluid portion of protoplasm, 

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

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



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



Euer gid. the cell-nucleus together with the cytoplasm lying Avithin its sphere of 

 influence. (Sachs. 1892.) 



Entosphere, {Ivto^;. 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 Bexedex, 1875.) 



Ergastic (e'p-ya^o/Aai. to work). Applied to relatively passive substances " formed 

 anew through activity of the protoplasm." Equivalent to metaplasmic. Cf. 

 alloplasmatic. (A. Meyer. 1896.) 



