From Longman Dictionary of Contemporary Englishescalatores‧ca‧la‧tor /ˈeskəleɪtə $ -ər/ ●●○ noun [countable] 
TBa set of moving stairs that take people to different levels in a building
TBa set of moving stairs that take people to different levels in a buildingExamples from the Corpus
escalator• Internal Transport Those who fly in are carried by escalator down to a railway platform.• On the other escalator, he decided to ride all the way down.• I could never find the escalators, or the door I came in when it was time to go out.• Stepping from the escalator he loped across the record department to find the other set of escalators.• He retreats along the corridor and passes the three injured, shooting another student in front of the escalators.• In fact it was only fifteen minutes by bike to the escalators.• They took the escalator down to the lower level and the Grillapolis café.Origin escalator (1900-2000) escalade “to climb up” ((16-21 centuries)) (from French, from Italian scalare) + elevator 