Understudy definition, to learn (a role) in order to replace the regular actor or actress when necessary. See more.
Radiation. radiation. (Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation.adiation. radiation. (Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation.
Definition of biology. 1  1 : a branch of knowledge that deals with living organisms and vital processes advances in the field of biology a biology textbook. 2  2a : the plant and animal life of a region or environment the biology of the rain forestb : the life processes especially of an organism or group the biology of cancer cells; broadly : ecology.