combining form

Definition of arithmo-

  1. :  number arithmograph arithmomania

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of arithmo-

borrowed from Greek, combining form from arithmós “number, amount,” from ari-, verbal base meaning “to count” (whence also nḗritos “countless,” from n(e)-, negative prefix + ari-, going back to Indo-European *h2rei-) + -thmo-, deverbal noun suffix — more at 1rite

Seen and Heard

What made you want to look up arithmo-? Please tell us where you read or heard it (including the quote, if possible).


capable of being understood in two ways

Get Word of the Day daily email!