| 单词 | epithelium |
| 释义 | Word Frequency epithelium(ˌɛpɪˈθiːlɪəm) nounWord forms: plural -liums or -lia (-lɪə) an animal tissue consisting of one or more layers of closely packed cells covering the external and internal surfaces of the body. The cells vary in structure according to their function, which may be protective, secretory, or absorptive Derived forms epithelial (ˌepiˈthelial) adjective Word origin C18: New Latin, from epi- + Greek thēlē nipple |
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