The Collaborative International Dictionary
Wall-sided
Wall-sided \Wall"-sid`ed\, a. (Naut.) Having sides nearly perpendicular; -- said of certain vessels to distinguish them from those having flaring sides, or sides tumbling home (see under Tumble, v. i.).
Wiktionary
wall-sided
a. (context nautical English) Having sides nearly perpendicular, rather than flaring or tumbling home.