equivalve
ɛˈkwɪvælt
Definitions
1. adjective
Having two equivalent or corresponding parts, especially referring to shells with two hinged parts of equal size.
“The equivalve shells of the bivalve mollusks were found in the fossil record.”
2. noun
A type of bivalve shell with two hinged parts of equal size.
“The equivalve shell of the oyster is a well-known example of this characteristic.”