单词	reniform
释义	reniform /ˈriːnɪfɔːm / adjective chiefly Mineralogy & Botany Kidney-shaped.Asymmetric divisions lead to the formation of a pair of reniform guard cells surrounding the stomatal opening.... Stalked, reniform sporangia reside clearly in the axis of the leaves. Lateral branches dichotomize several times before terminating in pairs of reniform sporangia. Origin Mid 18th century: from Latin ren 'kidney' + -iform.
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