The Collaborative International Dictionary
Preopercular
Preopercular \Pre`o*per"cu*lar\, a. (Anat.) Situated in front of the operculum; pertaining to the preoperculum. -- n. The preoperculum.
Wiktionary
preopercular
a. 1 (context anatomy English) Situated in front of the operculum. 2 (context anatomy English) Relating to the preoperculum. n. (context anatomy English) The preoperculum.