| 单词 | Najadales |
| 释义 | Najadales [´nāj·ǝ`dā·lēz] BOTANY An order of aquatic and semiaquatic flowering plants in the subclass Alismatidae; the perianth, when present, is not differentiated into sepals and petals, and the flowers are usually not individually subtended by bracts. |
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