Gneissoid

1 definition found

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

  Gneissoid \Gneis"soid\ (-soid), a. [Gneiss + -oid.]
     Resembling gneiss; having some of the characteristics of
     gneiss; -- applied to rocks of an intermediate character
     between granite and gneiss, or mica slate and gneiss.
     [1913 Webster]