An·​nu·​lar·​ia | \ ˌanyəˈla(a)rēə \

Definition of Annularia

: a large genus of fossil pteridophytic plants of the order Equisetales having annuli formed by the basal sheaths of the leaf whorls

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First Known Use of Annularia

1830, in the meaning defined above

History and Etymology for Annularia

New Latin, from Latin annulus + New Latin -aria

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The first known use of Annularia was in 1830

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Cite this Entry

“Annularia.” The Dictionary, Merriam-Webster Inc., Accessed 11 December 2019.

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heavy with or as if with moisture

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