dioptrate

adjective
di·​op·​trate | \ dīˈäpˌtrāt, -trə̇t \

Definition of dioptrate

: divided by a transverse line or septum used of the compound eyes of certain insects (such as water beetles) and of ocelli on the wings of certain moths and butterflies

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History and Etymology for dioptrate

dia- + optr- (irregular from Greek opsesthai to be going to see) + -ate

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Cite this Entry

“Dioptrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dioptrate. Accessed 7 Aug. 2020.

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