Definition of mentum
: a median plate of the labium of an insect
Recent Examples of mentum from the Web
The name actually comes from the Latin mentum, meaning chin, which is where the gland is located in the male lungless salamander.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mentum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Learn More about mentum
Seen and Heard
What made you want to look up mentum? Please tell us where you read or heard it (including the quote, if possible).