from The Century Dictionary.
- Like or likened to buttocks, as the umbones of a shell: as, the natiform tubercles of the brain.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
Resemblingor having the formof buttocks.
from Wiktionary, Creative Commons Attribution/Share-Alike License
First attested in 1681; formed as the Latin natis (“rump”, “buttocks”; from whose plural derives the English nates, “buttocks”, “haunches”) + the English -i- + -form.
I may stroke my natiform chin sceptically at Shea's cachinnations, but if such things truly make him tripudiate