adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A univalve mollusk or its shell.
2. 2
   a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes wordnet

Adjective

1. 1
   having one valve; typically used to refer to mollusks, notably slugs and snails. not-comparable
2. 2
   consisting of a single valve or piece, used to refer to a shell. not-comparable

Adjective

1. 1
   used of mollusks, especially gastropods, as snails etc. wordnet

Synonyms

All synonyms

gastropodgastropodbivalvesingle shelledunivalvedunivalved

Antonyms

All antonyms

bivalve

Etymology

Originated 1655–65 from uni- (“one”) + valve.

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