subopercular
/ˌsʌbə(ʊ)ˈpəːkjʊlə/ /ˌsʌbɒˈpəːkjʊlə/Zoology
adjective
Designating a bone in the lower part of the operculum of a fish; of or relating to this bone.
noun
A subopercular bone; = suboperculum.
Origin
Mid 19th century; earliest use found in Edward Griffith (1790–1858), naturalist. From sub- + opercular, after suboperculum.