■ noun a moving staircase consisting of a circulating belt of steps driven by a motor.
Origin
early 20th cent. (orig. US, as a trade name): from escalade 'climb a wall by ladder' (from escalade ), on the pattern of elevator .
■ noun a moving staircase consisting of a circulating belt of steps driven by a motor.
Origin
early 20th cent. (orig. US, as a trade name): from escalade 'climb a wall by ladder' (from escalade ), on the pattern of elevator .
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004