ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: under (III) + course
: a layer (as of flooring) immediately under a course of tiles : a course (as of shingles) laid beneath a covering course
ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: under (III) + course
: a layer (as of flooring) immediately under a course of tiles : a course (as of shingles) laid beneath a covering course
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012