Meaning of SHOULDER in English
( n. )
An abrupt projection which forms an abutment on an object, or limits motion, etc., as the projection around a tenon at the end of a piece of timber, the part of the top of a type which projects beyond the base of the raised character, etc.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012