The Collaborative International Dictionary of English v.0.48:

mase \mase\ (m[=a]z), v. i. [by back-formation from maser[2].]
   To emit coherent microwave radiation, as in a maser[2].
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Mase \Mase\, n. & v.
   See Maze. [Obs.] --Chaucer.
   [1913 Webster]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MASE
       Message Administration Service Element