Definition of organophosphorous in English:
organophosphorous
adjective ɔːˌɡanəʊˈfɒsf(ə)rəsˌɔːɡənəʊˈfɒsf(ə)rəsˌɔːɡ(ə)nəʊˈfɒsf(ə)rəs
Chemistry Attributive = "organophosphorus".
Origin
1950s; earliest use found in Ecology. From organo- + phosphorous, after organophosphorus.