univalve

noun

uni·​valve ˈyü-ni-ˌvalv 

1

: a mollusk with a shell consisting of one valve

especially : gastropod

2

: the shell of a univalve

univalve adjective

Word History

First Known Use

1668, in the meaning defined at sense 1

Kids Definition

univalve

1 of 2 adjective

uni·​valve

ˈyü-ni-ˌvalv

: having a shell made up of only one piece

univalve

2 of 2 noun

: a univalve mollusk shell or a mollusk having such a shell