400 A COMPENDIUM OF 
Actinology—ak'-tin-ol-oji (Gr. aktin, a ray; 
and /ogos, a treatise or discourse). The sci- 
ence or doctrine of the rays of light. 
Acrocarpi, plural—ak’-ro-kar-pi (Gr. akros, at 
the highest point; farpos, fruit). Mosses 
which have their fruit terminating the axis. 
Acrocarpous—ak’-ro-kar-pous, bearing fruit 
at the terminating axis of the plant, at or 
near the apex. 
Acheillary—ak-il’-er-i (Gr. a, without; chetlos, 
alip). An undeveloped lip-shaped petal, oc- 
curring as a rule in the orchid family. 
Achene—ak-e’-ne, also Achaenium, ak-e-ni- 
um (Gr. achanes, from a not, without; chaino, 
I crack or yawn). A one-seeded seed vessel 
which does not crack or open, 
Achlamydeous—ak’-lam-id-e-us (Gr. a with- 
out; chlamus, a loose, warm cloak). Naked 
flowers, plants having no floral envelope. 
Acicular—a-sik’-u-lar (Lat, acus, a needle; acic- 
war, a little needle). Applied to chemicals 
_ of mineral and vegetable origin. 
Acid—as’-id (Lat. acidus, sharp to the taste, 
sour; from aceo, I am sour or sharp; connec- 
ted with acus, a needle). A body which 
unites with bases to form salts; but chemi- 
cally speaking, acids are not always sour. 
Acinaceous—as’-i-na’-shus (Lat. acinus, a 
Stone or seed in a berry). Full of kernels. 
Acinaciform—as’-in-as’-i-form (Lat. acznaces, 
a straight sword or sabre). Leaves shaped 
like a Turkish scimetar or sword. : 
Aconite—ak’-o-nit (Lat. aconitum; Gr. akont- 
um). A poisonous plant commonly known 
