| 单词 | calyptra | 
| 释义 | calyptra [kǝ`lip·trǝ]  BOTANY 1. A membranous cap or hoodlike covering, especially the remains of the archegonium over the capsule of a moss.  2. Tissue surrounding the archegonium of a liverwort.  3. Root cap.  | 
	
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