type of mollusk having naked gills and no shell, 1844, literally "having naked gills," from nudi- "naked" + Latin branchae, from Greek brankhia "gills," plural of brankhion "fin."
Entries linking to nudibranch
nudi-
word-forming element meaning "hairless; leafless; naked," from combining form of Latin nudus "naked, bare, stripped," from PIE root *nogw- "naked" (see naked).