这个词是什么意思？
A plant family of the subclass ALISMATIDAE, class Liliopsida (monocotyledons) of aquatic plants. The flower parts are in threes with 3 green sepals and 3 white or yellow petals.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D034901 · MeSH 2026。
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