Aconitin 
Actinomycosis 
Acon‘itin, the alkaloid derived from 
monkshood, Aconitum Napellus, 
Linn. 
A’corn, the fruit of the oak. 
Acotyle’don (a, without, korvAndwr, 
used for seed-lobe), a plant desti- 
tute of cotyledons or seed-lobes ; 
Cryptogams and such plants as 
Cuscuta ; adj. acotyle’donous, 
acotyledo'neus. 
acramphib’ryous (dkpos, apex, dul, 
on both sides, BpJw, to bud), plants 
roducing lateral as well as apical 
fades Acramphib’rya, a division 
proposed by Endlicher to em- 
brace Dicotyledons and Gymno- 
sperms. 
Acroblaste’sis (dxpos, apex, Bdacrds, 
a bud), when the germ-tube of 
Lichens proceeds from an end of 
the spore; acroblas’tic, Celakov- 
sky’s term for the branch of an 
inflorescence which arises from a 
terminal bud; Acrobrya (8piw, to 
bud), plants growing at the point 
only, as all Acrogens having a 
distinct axis ; adj. acrob’ryous. 
acrocarp’ous (dxpos, apex, Kaprés, 
fruit), terminal fruited; a main 
division of Mosses; acrod’romous 
(dpdu0s, a course), venation-strands 
uniting at the apex of the leaf, as 
in Plantago; acrog’amous (ydos, 
marriage), plants producing the 
egg-apparatus at the summit of the 
embryo-sac, as in most Angiosperms 
(Van Tieghem); Acrog’amy, may 
be double, as when the pollen-tube 
and egg-apparatus are both apical ; 
or partly basigamic, either of male 
(pollen-tube) or female (egg-ap- 
paratus) (¢f. BASIGAMOUS) ; acrog’- 
enous (yevos, race), (1) used of 
plants growing at the apex, such 
as Ac’rogens, Ferns; (2) produced 
at the end of a filament, as some 
fungus spores; Acrogonid’‘ium 
(yovos, offspring, eldos, form), a 
gonidium formed at the apex of a 
gonidiophore ; acrog’ynous (yuvy, a 
woman), having the stem termin- 
ated by female organs, as arche- 
gonia; acrogyra‘tus (gyratus, 
turned away), having an elastic 
ring at the point (Lindley) as in 
Schizaea. 
Ac’ronus (perhaps from d«pov, the 
highest point), Necker’s term for 
an ovary without a basal disk. 
acronych’ius (d«pos, apex, dvvé, a claw), 
curved like the claw of an animal. 
acrop’etal (dxpos, apex ; peto, I seek), 
produced in a succession towards 
the apex, as applied to develop- 
ment of organs; the antithesis 
of basipetal; Acrosarc’um (cdpé, 
capkos, flesh), Desvaux’s term for 
a berry from an ovary with adnate 
calyx, as the currant; acroscop’ic 
(cxoréw, I gee), looking towards 
the summit; the reverse of basi- 
scopic ; Acrosperm’eae (orépua, a 
seed), Ac‘rosperms, those Angio- 
sperms which are presumed to 
have begun with simple poro- 
gamous mode of impregnation ; cf. 
PLEUROSPERM; Ac’rospire (o7eipa, 
a coil), Grew’s name for the first 
sprout of a germinating seed, the 
extruded radicle ; acrospi’red, ger- 
minated, as in malting ; Ac’rospore 
(copa, a seed), a spore formed at the 
summit of a sporophore or fila- 
ment ; acrot’/onous (rdvos, a cord), 
the tissue of the pollen-sac in 
Orchids prolonged to the upper 
end of the anther. 
Actinench’yma (dxrls, a ray; éyyuua, 
an infusion), cellular tissue formed 
in a star-shaped manner, as seen in 
a cross-section of Juncus ; actin'ic, 
used of certain rays of the spectrum, 
which have a powerful effect on 
growth; Act‘inism, the chemical 
action of sunlight; Act’inocarp, a 
fruit which is actinocarp’ic (kaprés, 
fruit), having the carpels or pla- 
centas radiating like the spokes of 
a wheel; actinomorph‘ic, -ous, 
(xoppy, shape), having flowers of 
a regular or star pattern, capable 
of bisection in two or more planes 
into similar halves ; Actinomyco’sis, 
a disease in the jawbone of man and 
animals attributed to a Fungus, 
Oocardia Actinomycosis, Trev. ; 
