A supposed material stated by Phipson becoming within commercial zinc so-called because certain of its substances are darkened by exposure to light
- a radioactive element of the actinide series; found in uranium ores
- A supposed steel, stated by Phipson becoming found in commercial zinc; -- so-called because particular of the substances tend to be darkened by experience of light.
radioactive factor discovered in 1899, from Greek actin-, brush. as a type of aktis (genitive aktinos) "ray, radiance" (see actino-) + chemical suffix -ium.
(n.) A supposed material, stated by Phipson to-be found in commercial zinc; -- so-called because certain of the substances are darkened by contact with light.