Cytogamy 
dealbate 
Cytog’amy (yduos, marriage), the 
union of cells ; Cytogen’esis (yévects, 
beginning), origin and develop- 
ment of cells; sometimes written 
Cytiogenesis; cytogenet/ic, per- 
taining to cell-formation; cytog’- 
enous, having connective tissue ; 
Cyto’geny = CYTOGENESIS; Cyto- 
hy drolist (#5op, water; vous, 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 (Avocs, 
a loosing), an enzyme which dis- 
solves the cell-wall; cytolytic, of 
a ferment so acting; Cytology 
(Aoyos, discourse), the science of the 
cell, its life history, nuclear divi- 
sions and development; adj. 
cytolog’ic, cytolog’ical; Cytomi’- 
erosomes (uikpds, small; cOpua, a 
body), the granules or microsomes 
imbedded in the cell-protoplasm ; 
Cy’toplasm (7Adcua, moulded), the 
general protoplasm of the cell 
(Strasburger); Cy’toplast, the cyto- 
plasm as a unit, in contrast to the 
nucleus; Cytoplast’in, a proteid 
which apparently forms the bulk 
of the Cytoplasm; Cy’tosomes 
(cGpa, a body), Vuillemin’s name 
for the granules of cell-protoplasm ; 
cytomicrosomes. 
dacryoi’deus (ddxpuv, a tear; €ldos, 
resemblance), used for pear-shaped 
fruit, oblong and rounded at one 
end, pointed at the other. 
dactyli’nus (Sdxrvdos, afinger), divided 
like fingers; Dactylorhi’za (fifa, 
root), the forking of roots; dac’- 
tylose, dactylo’sus, fingered, or 
finger-shaped. 
daed’aleous, daed’aleus (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 (@yxvya, an infu- 
sion), tissue made up of entangled 
cells, as in some Fungi. 
Dah‘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. 
Damp’ing, 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 KnicHt-Darwin Law. 
Darwin'ian 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. 
dasyphyll’ous, -lus (dacds, thick ; 
pvaAdor, 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. 
Daugh’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, 
71 
dealba'tus (Lat., white- 
