单词	prothallus
释义	prothallus noun pro·​thal·​lus (ˌ)prō-ˈtha-ləs  1 : the gametophyte of a pteridophyte (such as a fern) that is typically a small flat green thallus attached to the soil by rhizoids 2 : a greatly reduced structure of a seed plant corresponding to the pteridophyte prothallus Illustration of prothallus 1 antheridium 2 archegonium 3 rhizoid Word History Etymology New Latin First Known Use 1854, in the meaning defined at sense 1
随便看	enrol enroll enroll (in) enroll in enrolled enrolled (in) enrolled in enrollee enrollees enrollers enrolling enrolling (in) enrolling in enrollment enrollments enrolls enrolls (in) enrolls in enrolment enrolments enrols enroot enrooted enrooting enroots

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