Definition of alar septum
: one of the pair of lateral primary septa in the Paleozoic Tetracoralla from each of which the septa of one quarter of a corallite arise
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!
First Known Use of alar septum
Seen and Heard
What made you want to look up alar septum? Please tell us where you read or heard it (including the quote, if possible).