KARY< (GAMIC 



637 



KATHODIC 



Karyogamic {kar-e-o-gam f -ik) [napvov, nucleus; }duoc, 

 marriage]. Pertaining to tin- blending of nuclei, as 

 in reproduction. 



Karyokinesis [kar-e-o-kin-e* '-sis) [napvov, a nut (nu- 

 cleus) ; Kivqaiq, movement, change]. A complicated 

 series of changes accompanying the maturation of the 

 ovum and the extrusion of the polar globule ; indirect 

 or nuclear cell-division, characterized by aradiati 

 rangement of the protoplasm immediately about the 

 " centrosome " and the "sphere of attraction" at 

 one pole, but outside of the nucleus, and following 

 the division of the "sphere of attraction" into two 

 halves of clear protoplasm; also, by changes in the 

 nucleoplasm, the chromatin becoming granular and 



Ay \ By 



Karyokinesis. 

 A. Nuclear reticulum, resting stage. B. Preparing for divi- 

 sion. C. Wreath stage. D. Monaster with achromatic 

 spindle E. Barrel or nithode stage, or metakinesis, i. c, 

 chromatin-fibrils traveling along the achromatic spindle 

 toward the poles F Diaster. G. Daughter-wreath stage. 

 H. Daughter-cells passing to resting-stage. 



arranged as a transverse band or disc, while the achro- 

 matin is transformed into threads (karyomita), form- 

 ing a spindle-shaped structure {nuclear, spindle, 

 barrel- form, pi thos), stretching between the two astral 

 systems, or suns. The entire arrangement, central 

 disc, spindle, and the two suns, constitutes the so- 

 called amphiaster, or diaster, and, in connection with 

 the production of the polar globules, the archiamphias- 

 ter. The groups of the V-shaped chromatin-grains, 

 produced by the division of the central disc, are then 

 translated to the ends of the spindles, and form two 

 polar crowns (Carney's couronne polaire, the wreaths, 

 rosets, spirems) ; the spindle-threads break and are 

 drawn toward the polar crowns, and two daughter-nu- 

 clei result. 



Karyokinetic (kar-e-o-kin-ct'-ik) [napvov, nucleus ; 

 tdvTfffig, motion]. In biology, applied to the active 

 stages of nuclei. 



Karyolysis [kar-e-oV -is-is) [napvov, nucleus ; '/A-eiv, to 

 loose]. The segmentation of the nucleus of the cell. 



Karyolytic (kar-e-o-lit f -ik) [napvov, nucleus ; Xveiv, to 

 loose]. Relating to karyolysis. 



Karyomita (kar-e-o'-tnit-ah i [napvov, nucleus ; uiroc, a 

 thread]. In biology, the achromatin-threads forming 

 the nuclear spindle in a dividing or active nucleus. 



Karyomitoic [kar-e-o-mit-o 1 '-ik) [napvov, nucleus ; u 

 a thread]. Relating to karyomitosis. 



Karyomitoma {kar-e-o-mit-o f -mak). See Cell-bodv. 



Karyomiton ikar-e-om' '-it-on) . See Chromatin. 



Karyomitosis [kar-e-o-mit-o' '-sis) [napvov, nucleus ; 

 i/iTnf, a thread]. The division or splitting ol 

 nuclear mass ^i i bromatin-fibers. 



Karyomitotic (kar-e-o-mit-ot* -ik) [napvov, nucleus; 

 fiirog, a thread]. Relating to karyomitosis. 



Karyoplasm [kar* -e-o-plazm) [napvov, a nut, kernel ; 

 -'/'im/ii, anything formed]. In biology, the nuclear 

 substance of a cell. See Chromatin. 



Karyoplasma (kar-e-o-plaz' -mah). Same as Karyo- 

 plasm. 



Karyosoma (kar-e-o-so' -mah) [napvov, nucleus ; ccjua, 

 a body, //., A'aryosomata]. A nuclear microsoma ; 

 a round body resembling a nucleolus, contained in the 

 segmentation-nucleus of the ovum. 



Karyostasis (kar-e-os' -ta-sis) [napvov, nucleus; ara- 

 aic, a stoppage]. The resting-stage of nuclei of cells. 

 It is opposed to karyokinesis. 



Karyostatic (kar-e-o-statf -ik) [napvov, nucleus ; ardaiq, 

 a stoppage]. Pertaining to karyostasis. 



Karyostenosis (kar-e-o-ste-no' -sis) [napvov, a nucleus ; 

 crrevor, narrow ; gtev6eiv, to make narrow]. The sim- 

 ple division of the nucleus of a cell. This process 

 is called also akinetic, or direct division. 



Kassu (kas'-oo) [E. Ind.]. A black astringent sub- 

 stance obtained from areca nuts, and used for the 

 same purpose as true catechu. 



Kata- (kat'-ah-). For words thus beginning, and not 

 found under K., see Cata-. 



Katabolergy (kat-ab-ol' -er-je) . See Cataboler 



Katabolic (kat-ab-ol' -ik). See Catabolic. K. Nerves, 

 thermo-excitory, as distinguished from anabolic, or 

 thermo-inhibitory, nerves. 



Katabolism (kat-ab f -o-lizm). See Catabolism. 



Katacrotic (kat-ak-rot f -ik). Same as Catadicrotic. 



Katadicrotic (kat-ah-di-krot f -ik). See Catadicrotic. 



Katadicrotism (kai-ad-ik' -rot-izm). See Catadicrotism. 



Katadidymus [kat-ad-id' -im-us). See Catadidymus. 



Katalepsy (kat'-al-ep-se). See Catalepsy. 



Katalysis (kat-al'-is-is). See Cata I: 



Katantostomus [kat-an-to-sto / -mus). See Catantosto- 

 mus. 



Katanturaniscus (kat-a/i-tiir-an-is / -kus). See Catan- 

 tnraniscus. 



Katanturanus (kat-an-ffir'-an-us). See Catantnranus. 



Kataplasm (kat'-ap-lazm). See Poultice. 



Katastate (ka/'-as-tdt). See Catastate. 



Katatonia (kat-at-o' '-ne-ah). See Catatonia. 



Katelectrotonic (kat-el-ek-tro-ton'-ik). See Catelectro- 

 tonic. K. Zone. See Zone. 



Katelectrotonus (kat-e/-ek-trot f -o-nus). See Catelec- 

 trotonus. 



Katharophore (kath-ar f -o-for) [naBap6c, clean ; oopeeiv, 

 to carry]. An instrument for cleansing the urethra. 



Katharsis (kath-ar'-sis). See Catharsis. 



Kathetometer (kath-et-om' '-et-er) [nard, against ; 

 pov, measure]. An instrument for ascertaining the 

 level of fluids. 



Kathion (kath'-e-on). See Cation. 



Kathode (kath'-od) [nard, down; 686c, path]. The 

 negative pole of a galvanic battery. 



Kathodic {kath-od'-ik) [Kara, down ; 666g, path]. 

 Pertaining to the kathode or negative pole of a galvanic 

 battery. In biology, turned in the opposite direction to 

 that of the genetic spiral. K. Closure-contraction, 

 the muscular contraction occurring when the circuit 

 is closed with the rheophore on a motor point. K. 

 Opening-contraction, the muscular contraction that 

 occurs when the circuit is opened. 



