UNDERLAYMENT
Meaning of UNDERLAYMENT in English
/un'deuhr lay"meuhnt/ , n.
material laid between a subfloor and a finish floor of linoleum, asphalt tile, etc.
[ 1945-50; UNDERLAY + -MENT ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012