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GLOSSARY 



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

 nucleomicrosomes. (Strasburger, 1882.) 



Cytomi'tome {kvto'^, hollow (a cell) : ^trto/xa, from |UtT09, thread), the cytoplasmic 

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



Cy'toplasm {KVTo<i, TrXdafxa). 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 (kvVos, hollow (a cell) : o-oj/xa. 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 {Sepfxa, skin), the living protoplasm asserted to form a part of the 

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



Der'matosomes (8ep/xa, skin : crw/xa, body), the plasomes which form the cell-mem- 

 brane. (Wiesxer, 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. 

 (Weismaxx. 1 89 1.) 



[Deuthy'alosome] (8evT(epo^), second; see Hyalosome), the nucleus remaining 

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



Deu'toplasm (8et'T(e/oos), second ; TrAacr/xa, anything formed), yolk, lifeless food- 

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

 Bexedex. 1870.) 



Diakine'sis (8ta, through), the segmented-spireme-stage, following the synapsis, in 

 the primarv 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.) 



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. (Flemmixg, 1882.) 



Dy'aster (8m5, two; see Aster. 2), the double group of chromosomes during the 

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



Ectosphere (eKTo^, 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 

 Bexedex. (O. Hertwig, 1875.) 



Enchyle'ma (ev, in; x^^^^' juice), i. The more fluid portion of protoplasm, 

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

 (cvtolvmph) of cytoplasm as opposed to the reticulum. (Carxov, 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, (evrog, 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. (Vax Bexedex, 1875.) 



Ergastic (epya^o/xat, to work). Applied to relatively passive substances '• formed 

 anew through activity of the protoplasm.'' Equivalent to metaplasmic. C/. 

 alloplasmatic. (A. Meyer, 1896.) 



