noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A ventrally orientated (inferior) mouth, in some fish, adapted for grazing on algae etc.
2. 2
   Any of several fish that have this type of mouth

Etymology

From sucker + mouth.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.