A species of brome grass (Bromus secalinus) which is a
   troublesome weed in wheat fields, and is often erroneously regarded as
   degenerate or changed wheat; it bears a very slight resemblance to
   oats, and if reaped and ground up with wheat, so as to be used for
   food, is said to produce narcotic effects; -- called also cheat and
   Willard's bromus.