acritarch

[ ak-ri-tahrk ]

Phonetic (Standard)IPA

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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Other Words From

acri·tarchous adjective

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Word History and Origins

Origin of acritarch¹

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

acrimony acritical

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