| Word | Definitions | Synonyms |
|---|---|---|
| bivalve | (adjective) used of mollusks having two shells (as clams etc.) | Synonyms: bivalved |
| twelve | (adjective) denoting a quantity consisting of 12 items or units | Synonyms: 12, dozen, xii |
| univalve | (adjective) used of mollusks, especially gastropods, as snails etc. | - |