英语词汇“epitheca”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	epitheca
释义	epitheca epitheca (ˌɛpɪˈθiːkə) n, pl -cae (-siː) (Zoology) the outer and older layer of the cell wall of a diatom. Compare hypotheca[C19: from epi- + theca] epitheca epitheca [¦ep·ə′thē·kə] (invertebrate zoology) An external, calcareous layer around the basal portion of the theca of many corals. A protective covering of the epicone. The outer portion of a diatom frustule.
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