Cytogamy 



dealbate 



Cytog'amy (yd/^os, marriage), the 

 union of cells ; Cytogen'esis (ytve<ris, 

 beginning), origin and develop- 

 ment of cells ; sometimes written 

 Cytiogenesis ; cytogenet'ic, per- 

 taining to cell-formation; cytog 7 - 

 enous, having connective tissue ; 

 Cyto'geny = CYTOGENESIS ; Cyto- 

 hy'drolist (v5op, water; \v<ns, a 

 loosing), an enzyme which attacks 

 and breaks up the cell- wall by 

 hydrolysis ; Cytohy'aloplasm ( + 

 Hyaloplasm), the protoplasm of 

 the cell, apart from any granules 

 or foreign matter ; Cy'tolist (XvVts, 

 a loosing), an enzyme which dis- 

 solves the cell-wall ; cytolyt'ic, of 

 a ferment so acting ; Cytol'ogy 

 (Xo'-yos, discourse), the science of the 

 cell, its life history, nuclear divi- 

 sions and development ; adj. 

 cytolog'ic, cytolog'ical ; Cytomi'- 

 crosomes (fUKp&s, small ; crcD^a, a 

 body), the granules or microsomes 

 imbedded in the cell-protoplasm ; 

 Cy'toplasm (7rXao>ia, moulded), the 

 . general protoplasm of the cell 

 (Strasburger) ; C/toplast, tke cyto- 

 plasm as a unit, in contrast to the 

 nucleus; Cytoplast'iilf a proteid 

 which apparently forms the bulk 

 of the Cytoplasm ; Cy'tosomes 

 (o-w/m, a body), Vuillemin's name 

 for the granules of cell-protoplasm ; 

 cytomicrosomes, 



dacryoi'deus (8</cpu, a tear; eTSoy, 

 resemblance), used for pear-shaped 

 fruit, oblong and rounded at one 

 end, pointed at the other. 



dactyli'nus (3a/n-iAos, a finger), divided 

 like fingers ; Dactylorni'za (pifr, 

 root), the forking of roots; dac'- 

 tylose, dactylo'sus, fingered, or 

 finger-shaped. 



daed'aleous, daed'cdeus (Lat. = skilful 

 craft), (1) the apex of a leaf irregu- 

 larly jagged, though not arcuate ; 

 (2) wavy and irregularly plaited as 

 the hymenium of some Agarics ; 

 Daedalench'yma (tyxv/ja, an infu- 

 sion), tissue made up of entangled 

 cells, as in some Fungi. 



71 



Dab/line, a substance resembling 

 starch from the tubers of the genus 

 Dahlia. 



Dam'mar, a transparent resin from 

 Agathis loranthifolia Salisb., for- 

 merly named Dammara orientalis, 

 Lamb. 



Damping 1 , a cultivator's term for 

 premature decay in plants, especi- 

 ally young seedlings, attributed to 

 excess of moisture. 



Daph'nin, the bitter principle of 

 Daphne Mezereum, Linn. 



Darwin, see KNIGHT-DARWIN Law. 



Darwinian CurVature, the bending 

 induced by the irritation of any 

 foreign substance close to the apex 

 of the root. 



date-shaped, resembling a date in 

 form. 



dasyphylTous, -lus (Sao-fo, thick ; 

 <f>v\\ov, a leaf), (1) thick-leaved; (2) 

 leaves thickly set ; (3) with woolly 

 leaves. 



Datis'cin, a substance having the 

 appearance of grape - sugar, first 

 obtained from Datisca cannabina, 

 Linn. ; it has been used as a yellow 

 dye. 



Datu'rine, an alkaloid of Datura 

 Stramonium, Linn. 



Daugn'ter-cells, young cells derived 

 from the division of an older one, 

 the mother-cell ; ~ Chro'mosome, 

 a secondary chromosome, derived 

 from division of the original ;~ 

 Skein, stages in nuclear division 

 when the chromatin is more or less 

 in a reticulate condition ; further 

 distinguished by some observers 

 into ' ' loose " or " close " ; ~ Spore, a 

 spore produced immediately from 

 another or upon a promycelium ; ~ 

 Star, one of the groups of chromatic 

 filaments at the poles of a dividing 

 nucleus ; the two together with the 

 connecting spindle constitute the 

 "Dyaster" stage. 



Day-position, the pose assumed by 

 leaves during the day, in contra- 

 distinction to that taken for the 

 night. 



deal'bate, dealba'tus (Lat., white- 



