Radiotoxicity

Part of speech: noun

Definitions

1. The measurement of the harmful effects radiation has on biological organisms and the environment occurs through a process that evaluates exposure levels and resulting toxicity
2. The degree to which radiation can cause harmful effects to living organisms and the ecosystem is assessed by studying the exposure levels and subsequent toxic effects
3. The extent to which radiation can negatively impact living organisms and ecosystems is determined by analyzing exposure levels and their toxic outcomes

Etymology: Radiotoxicity is a plain technical coinage: "radiotoxic" with the suffix "-ity" added. Its first part, "radio-", comes from Latin "radius", meaning ray or spoke of a wheel, a sense that English later extended to electromagnetic and radioactive emission. The second part traces back much further. Ancient Greek "tóxon" meant bow, the weapon for shooting arrows, and from it came "toxikón", the poison used to tip arrows. Latin borrowed this as "toxicum", and French and English followed, so "toxic" carries the idea of a substance once applied to weapons. The suffix "-ity" arrived in English through Old French from Latin "-itās", and it turns adjectives into abstract nouns naming a quality. Adding it to "radiotoxic" yields a noun for the degree to which radiation, or a radioactive substance, is poisonous to living things. The word is a modern scientific formation, built from classical parts rather than inherited from ancient usage.