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stairstep

or stair-step

[stair-step]
noun
  1. a step in a staircase.
  2. stairsteps, stairs; a staircase.
  3. a person or thing whose position, status, behavior, or the like suggests the shape or rise of the steps in a staircase: Their six children are stairsteps ranging from ages two to twelve.
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verb (used without object), stair·stepped, stair·step·ping.
  1. to occur or move in a regular pattern suggesting the steps of a staircase: housing units stairstepping down the hill to the edge of the lake.
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adjective
  1. suggesting or resembling the steps of a staircase, as in movement or shape: stairstep progress in improved appliance sales.
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Origin of stairstep

First recorded in 1825–35; stair + step
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018