ACTINIFORM
Ac*tin"i*form, a. Etym: [Gr. -form.]
Defn: Having a radiated form, like a sea anemone.
ACTINISM
Ac"tin*ism, n. Etym: [Gr.
Defn: The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.
ACTINIUM
Ac*tin"i*um, n. Etym: [Gr. (Chem.)
Defn: A supposed metal, said by Phipson to be contained in commercial zinc; — so called because certain of its compounds are darkened by exposure to light.
ACTINO-CHEMISTRY
Ac`ti*no-chem"is*try, n.
Defn: Chemistry in its relations to actinism. Draper.
ACTINOGRAM
Ac*tin"o*gram, n. [Gr. , , ray + -gram.]
Defn: A record made by the actinograph.