DECOCT Meaning of DECOCT in English [ dɪ'kɒkt ]■ verb archaic extract the essence from (something) by heating or boiling it.OriginME: from L. ~- , decoquere 'boil down', from de- 'down' + coquere 'cook'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004