| n. | 1. | (Zool.) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs. |
| a. | 1. | (Bot. & Zool.) Having one valve; |
| Noun | 1. | univalve - a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes Synonyms: gastropod |
| Adj. | 1. | univalve - used of mollusks, especially gastropods, as snails etc. |