442 GLOSSARY 



determinants, and Ids. Identified by Weismann as the chromosome. (WEIS- 

 MANN, 1891.) 



Id'ioblasts (18105, one's own ; ySAao-ro?, germ), the hypothetical ultimate units of 

 the cell; the same as biophores. (O. HERTWIG, 1893.) 



Idioplasm (18105, one's own ; TrAatr/xa, a thing formed), equivalent to the germ- 

 plasm of Weismann. The substance, now generally identified with chromatin, 

 which by its inherent organization involves the characteristics of the species. 

 The physical basis of inheritance. (NAGELI, 1884.) 



Id'iosome (i'8ios, one's own; o-w/xa, body), the same as idioblast or plasome. 

 (WHITMAN, 1893.) 



Idiozome (18109, specially formed ; uy>ux, girdle) . The sphere, often called attrac- 

 tion-sphere and usually enclosing the centrosomes, found in the spermatids of 

 animals. (MEVES, 1897.) 



Interfilar substance, the ground-substance of protoplasm as opposed to the thread- 

 work. (FLEMMING, 1882.) 



Interzonal fibres (" Filaments reunissants " of Van Beneden. " Verbindungs- 

 fasern" of Flemming and others). Those spindle-fibres that stretch between 

 the two groups of daughter-chromosomes during the anaphase. Equivalent 

 in some cases to the central spindle. (MARK, 1881.) 



Iso'tropy (uros, equal; rpomy, a turning), the absence of predetermined axes (as 

 applied to the egg). (PFLUGER, 1883.) 



[Ka'ryaster] (/<apvoj>, nut, nucleus ; see Aster, 2), the star-shaped group of chromo- 

 somes in mitosis. Opposed to cytaster. (FLEMMING, 1882.) 



Karyenchy'ma (/capvov, nut, nucleus; ey, in; x^^ 5 ? juice), the "nuclear sap." 

 (FLEMMING, 1882.) 



Karyokine'sis (xapvoi/, nut, nucleus; /a'vrjo-is, change, movement), the same as 

 mitosis. (SCHLEICHER, 1878.) 



[Karyoly'ma] , the "karyolytic" (mitotic) figure. (AUERBACH, 1876.) 



Ka'ryolymph. The nuclear sap. (HACKEL, 1891.) 



[Karyo'lysis] (Kapvovj nut, nucleus; Awis, dissolution), the supposed dissolution 

 of the nucleus during cell-division. (AUERBACH, 1874.) 



[Karyoly'tic figure] (see Karyolysis), a term applied by Auerbach to the mitotic 

 figure in living cells. Believed by him to result from the dissolution of the 

 nucleus. (AUERBACH, 1874.) 



Karyomi'crosome (see Microsome), the same as nucleo-microsome. 



Karyomi'tome (Kapvov, nut, nucleus ; /xtrco/xa, from /XI'TOS, a thread), the nuclear as 

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



Karyomito'sis (/capvov, nut, nucleus ; see Mitosis), mitosis. (FLEMMING, 

 1882.) 



Ka'ryon (xapvov, nut, nucleus), the cell-nucleus. (HACKEL, 1891.) 



Ka'ryoplasm (xapvov, nut, nucleus ; TrAaoyAa, a thing formed), nucleoplasm. The 

 nuclear as opposed to the cytoplasmic substance. (FLEMMING, 1882.) 



Ka'ry osome (Kapvov, nut, nucleus ; o-<o/xa, body) . i . Nucleoli of the '" net-knot " 

 type, staining with nuclear dyes, as opposed to plasmosomes or true nucleoli. 

 (OGATA, 1883.) 2. The same as chromosome. (PLATNER, 1886.) 3. Caryo- 

 some. The cell-nucleus. (WATASE, 1894.) 



[Karyo'ta] (/capvov, nut, nucleus), nucleated cells. (FLEMMING, 1882.) 



Karyothe'ca (*apvoi/, nut, nucleus ; $77*07, case, box), the nuclear membrane. 

 (HACKEL, 1891.) 



Ki iioplasm (KIVCU/, to move - 7rAao-/xa, a thing formed), nearly equivalent to 

 archoplasm, but used in a broader sense to denote in general the more 

 active elements of protoplasm from which arise fibrillas, the substance of cilia, 

 and (in plants) the peripheral " Hautschicht " from which the membrane is 



