monostylous 
Motor 
plied to the leaves of Mosses and 
the thallus of Algae when com- 
posed of a single layer of cells ; 
monosty’lous, -lus (+StyzLus) hav- 
ing a single style. 
Mono’sy (udywois, deserted), Morren’s 
term for the abnormal isolation of 
parts due to (a) ApESmy or (b) 
DIALYSIS. j 
monosymmet’rical (udvos, one, ovp- 
werpos, proportionate), used of a 
flower which can be bisected in 
one plane only, zygomorphic ; 
monothalam’ic, monothal’amous 
(@ddapos, a bed-chamber), (1) applied 
to apothecia consisting of a single 
chamber ; (2) when galls consist of 
only one interior chamber ; mono- 
thal’mic, derived from a single 
flower, as most fruits (Crozier) ; 
monothe’cal (647, a case), having 
asingle loculusor cell; monot’ocous, 
-cus (réxos, child-birth), fruiting 
once only, as annuals and biennials, 
monocarpic; monotrop‘ic (rporh, a 
turning), applied to bees which 
visit only one species of flower ; 
monotyp‘ic (réos, a type), having 
only one exponent, as a genus with 
but one species ; Monox’eny (tévos, 
a host), used of a parasite on one 
host only, autoecious. 
Mon’ster, Monstrum (Lat., an un- 
natural production), an abnormal- 
ity ; Monstrosity, Monstro’sitas, 
some conformation deviating from 
the usual and natural structure; 
adj. mons’trous. 
mon’tane, monta’nus (Lat.), pertain- 
ing to mountains, as a plant which 
grows on them, 
Mor‘ia + (uopos, a share), parts of a 
flower in general, as pentamorius, 
all parts in fives. Ree 
Mor’in (Morus, mulberry), a principle 
derived from the yellow heart- 
wood of fustic, Maclura aurantiaca, 
Nutt. ; the name is derived from 
Morus, to which genus the plant 
was formerly referred; Morozy mase 
(Svun, leaven), an assumed enzyme 
in the mulberry, now believed to be 
a mixture of diastase and zymase. 
Morph’ia, Morph'ine (Morpheus, the 
god of sleep), the best known of 
all the alkaloids contained in the 
opium poppy. 
mor’phus (“op¢}, shape), in Greek 
compounds=appearance, as rhizo- 
morphus, having the appearance of 
a root ; Morphogen’esis (yévects, be- 
ginning), the production of morpho- 
logical characters ; morpholog’ical, 
relating to Morphology ; ~ Spe’cies, 
Parmentier’s term for such specific 
forms as occur in Rosa, which are 
assumed to have departed from 
their ancestral form in conse- 
quence of varied environment ; 
Morphol’ogy (Ad-yos, discourse), the 
study of form and its develop- 
ment. 
Morpho’sis (uopdwors, a shaping), the 
manner of development ; the order 
in which organs form from their 
earliest to their final condition. 
mos’chate, moscha’'tus (moschus, 
musk), musky. 
Moth’er, used in the sense of 
“parent”; ~ Cells, those which 
divide to form other cells; ~ Plant, 
(1) the parent plant, from which 
vegetative portions have been de- 
rived ; (2) the female or seed-bearing 
parent of a hybrid; ~ Skein, a 
continuous ribbon-like figure of 
chromatin in the early stages of 
nuclear division, further divided 
into close ~, looped ~, and loose ~ ; 
~ Star = MowastER, a stage of 
nuclear division. 
Moth’er-of-Vin'egar, the active agent 
in acetous fermentation, Saccha- 
romyces Mycoderma, Reess. 
mo’tile (motus, a moving), move- 
able; ~ Re’gion, (1) in growing 
members the region of elongation ; 
(2) in mature members a distinct 
organ, such as the pulvinus in 
Mimosa pudica, Linn. 
Motility (Fr. motilité), the power of 
movement ; ~ of Pro’toplasm, a 
suggested emendation of ‘‘ contrac- 
tility” of protoplasm. 
Mo’tor (Lat., a mover) Zone, another 
term for MorrLE REGION. 
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