'Radioactivity' is the energy and mass released by spontaneous changes in the nucleus of an atom. However, 'Radiation' is energy that travels ('radiates') as waves or particles. Heat, light, sound, microwaves, radar, radio waves, X-rays, alpha and beta particles, and gamma rays are all forms of radiation.
For medicine, see etiology (medicine) . Etiology (/iËtiËÉlÉdÊi/ ; alternatively aetiology or aetiology) Ã¦tiology is the study of, causation or. Origination the word is derived from The greek, Î±á¼°ÏÎ¹Î¿Î»Î¿Î³Î¯Î±, aitiologia giving a reason (for, Î±á¼°ÏÎ¯Î±, aitia; cause -and, -Î»Î¿Î³Î¯Î±). logiatiology (/iËtiËÉlÉdÊi/ ; alternatively aetiology or aetiology) Ã¦tiology is the study of, causation or. origination
heredity. n, pl-ties. 1. (Biology) the transmission from one generation to another of genetic factors that determine individual characteristics: responsible for the resemblances between parents and offspring. 2. (Biology) the sum total of the inherited factors or their characteristics in an organism. geneagenetic, adj. genetics. 1. Biology. the science of heredity, studying resemblances and differences in related organisms and the mechanisms which explain these phenomena. 2. the genetic properties and phenomena of an organism. â geneticist, n.