| 单词 | peristome | 
| 释义 | Word Frequency peristome(ˈpɛrɪˌstəʊm) noun 1.  a fringe of pointed teeth surrounding the opening of a moss capsule  2.  any of various parts surrounding the mouth of invertebrates, such as echinoderms and earthworms, and of protozoans  Derived formsperistomal (ˌperiˈstomal) or peristomial (ˌperiˈstomial) adjective Word originC18: from New Latin peristoma, from peri- + Greek stoma mouth | 
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