[case.ment] n [ME, hollow molding, prob. fr. ONF encassement frame, fr. encasser to enchase, frame, fr. en- + casse] (15c): a window sash that opens on hinges at the side; also: a window with such a sash
CASEMENT
Meaning of CASEMENT in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012