| 单词 | epithecae | 
| 释义 | epithecae in British English (ˌɛpɪˈθiːsiː) plural noun  epitheca epitheca in British English (ˌɛpɪˈθiːkə) nounWord forms:  plural -cae (-siː) the outer and older layer of the cell wall of a diatom   Compare hypotheca Word origin C19: from epi- + theca | 
	
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