Definition of dioptrate
: divided by a transverse line or septum —used of the compound eyes of certain insects (such as water beetles) and of ocelli on the wings of certain moths and butterflies
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 dioptrate
dia- + optr- (irregular from Greek opsesthai to be going to see) + -ate
Seen and Heard
What made you want to look up dioptrate? Please tell us where you read or heard it (including the quote, if possible).