Agnostus

noun

Ag·​nos·​tus

ag-ˈnä-stəs

: a genus of small blind Cambrian and Ordovician trilobites that with a number of related forms in which the cephalon and pygidium are almost indistinguishable constitute an order (Agnostida) of highly specialized forms

Word History

Etymology

borrowed from New Latin, borrowed from Greek ágnōstos "unknown"

First Known Use

1824, in the meaning defined above

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