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acritarch

[ ak-ri-tahrk ]
/ ˈæk rɪˌtɑrk /
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noun Paleontology.
any of various microfossils, of unknown biological affinities, having a central cavity enclosed by a wall of chiefly organic composition.
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Origin of acritarch

1963; <New Latin Acritarcha (neuter plural), irregular <Greek ákrit(os) confused, doubtful (see a-6, critic) + archḗ beginning, origin (cf. archi-)

OTHER WORDS FROM acritarch

ac·ri·tar·chous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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