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epivalve

noun
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epi·​valve | \ ˈepə̇, ˈepē+ˌ- \

Definition of epivalve

1 : the apical half of the shell of certain dinoflagellates
2 : the epitheca of a diatom

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History and Etymology for epivalve

epi- + valve

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“Epivalve.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epivalve. Accessed 20 Sep. 2020.

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