Hygroscope

2 definitions found

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

  Hygroscope \Hy"gro*scope\, n. [Gr. ? wet + -scope: cf. F.
     hygroscope.] (Physics)
     An instrument which shows whether there is more or less
     moisture in the atmosphere, without indicating its amount.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  hygroscope
       n : hygrometer that shows variations in the relative humidity of
           the atmosphere