Spirograph

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Spirograph \Spi"ro*graph\, n. [L. spirare to breathe + -graph.]
     (Physiol.)
     An instrument for recording the respiratory movements, as the
     sphygmograph does those of the pulse.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  spirograph
       n : a measuring instrument for recording the depth and rapidity
           of breathing movements