Pronunciation: /əˈkælɪpˌtreɪt/
adjective relating to or belonging to a large group of flies characterized by the absence of a calypter (a membranous lobe covering the halteres)
A1 Some flies are acalyptrate, meaning they lack a calypter.
A2 The acalyptrate flies do not have the characteristic calypters found in other species.
B1 Entomologists study the differences between calyptrate and acalyptrate flies.
B2 The acalyptrate species of flies exhibit unique behaviors not seen in calyptrate species.
C1 The acalyptrate nature of certain fly species has led to further research in evolutionary biology.
C2 The intricate genetic differences between calyptrate and acalyptrate flies fascinate scientists studying insect evolution.
formal The acalyptrate flies lack the calypter, a small lobe at the base of the wing.
informal I learned about acalyptrate flies in my biology class.
slang Those acalyptrate bugs are so annoying!
figurative Her mind was like an acalyptrate fly, buzzing around without direction.
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