noun Ag·nos·tus \ag-ˈnä-stəs\

Definition of Agnostus

  1. :  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

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Origin and Etymology of agnostus

borrowed from New Latin, borrowed from Greek ágnōstos “unknown” — more at 1agnostic

First Known Use: 1824

Seen and Heard

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to cast off or become cast off

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