Definition of biorational in English:

biorational

adjective

Farming
  • Designating or relating to pest and weed control agents used because of their specific effects upon the organisms they are intended to control, rather than because of their toxicity or other general effects; employing or involving such agents.

Pronunciation

biorational

/ˌbʌɪə(ʊ)ˈraʃ(ə)n(ə)l/ /ˌbʌɪə(ʊ)ˈraʃən(ə)l/

Origin

1970s.