COLEOPTILE Meaning of COLEOPTILE in English [ ˌkɒlɪ'ɒptʌɪl ]■ noun Botany a sheath protecting a young shoot tip in a grass or cereal.OriginC19: from Gk koleon 'sheath' + ptilon 'feather'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004