Definition of Agnostus
: 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
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of agnostus
borrowed from New Latin, borrowed from Greek ágnōstos “unknown” — more at 1agnostic
First Known Use: 1824
Seen and Heard
What made you want to look up Agnostus? Please tell us where you read or heard it (including the quote, if possible).