from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The basal part of the labium of insects, which bears the mentum.
from the GNU version of the Collaborative International Dictionary of English
- n. The basal part of the labium of insects. It bears the mentum.
from The Century Dictionary and Cyclopedia
- n. In entomology, the proximal one of two basal median parts or pieces of the labium, the other being the mentum; the proximal one of the two basal parts of the second maxilla. See cuts under mouth-part, palpus, Hymenoptera, and Insecta.
sub- + mentum (Wiktionary)