uptake

(uptāk′)

noun

  1. the act of taking up; a drawing up, absorbing, etc.
    1. a pipe carrying smoke and gases from a furnace to its chimney
    2. a ventilating shaft or pipe

See uptake in American Heritage Dictionary 4

noun
  1. A passage for drawing up smoke or air.
  2. Understanding; comprehension: very quick on the uptake.
  3. An act of taking in or absorbing, especially into a living organism.

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