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inequivalve

[in-ee-kwuh-valv] /ɪnˈi kwəˌvælv/
adjective
1.
(of a bivalve mollusk) having the valves of the shell unequal in shape and size.
Origin
1770-1780
1770-80; in-3 + equi- + valve
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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