oothecaWiktionary 原文构词拆分oo-前缀“egg-”Relating to eggs or ova.+theca词根/词干“sheath”词源说明From oo- (“egg-”) + theca (“sheath”).释义（英文）名词 NounAn egg case of any of the orthopteroid insects (such as cockroaches and mantids).(botany) The theca or sporangium of ferns.词族派生词（1）oothecal