spirograph

(spīrə graf′, -gräf′)

noun

an instrument for recording the movements of breathing

Origin: spiro- + -graph

Related Forms:

See spirograph in American Heritage Dictionary 4

noun
An instrument for registering the depth and rapidity of respiratory movements.

Related Forms:

  • spiˌro·graphˈic adjective
  • spiˌro·graphˈi·cal·ly adverb
  • spi·rogˈra·phy (spī-rŏgˈrə-fē) noun

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