onomasticon

noun

on·​o·​mas·​ti·​con

ˌänəˈmastə̇ˌkän,

-kən

plural -s

1

a

: a collection or listing of words especially in a specialized field (as science or commerce)

b

: a work containing such a collection or listing : wordbook, lexicon

2

a

: a collection or listing of proper names of persons or places usually with etymologies

b

: a work containing such a collection or listing

Word History

Etymology

New Latin, from Greek onomastikon, from neuter of onomastikos onomastic

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!