Definition of frustulum
: a light breakfast allowed on fast days in the Roman Catholic Church
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 frustulum
New Latin, from Latin, small piece
Seen and Heard
What made you want to look up frustulum? Please tell us where you read or heard it (including the quote, if possible).