• (n. pl.) A suborder of marine gastropod mollusks, in which the gills are between the foot and the mantle.
<marine biology> A suborder of marine gastropod mollusks, in which the gills are between the foot and the mantle. ... Origin: NL. See Inferobranchiate. ... (19 Mar 1998) ... 
In`fe·ro·bran`chi·a'ta noun plural [ New Latin See Inferobranchiate .] (Zoology) A suborder of marine gastropod mollusks, in which the gills are between the foot and the mantle.