monosymmetrical

from The Collaborative International Dictionary of English v.0.48

Monosymmetric \Mon`o*sym*met"ric\, Monosymmetrical
\Mon`o*sym*met"ric*al\, a. [Mono- + symmetric, -ical.]
   (Crystallog.)
   Same as {Monoclinic}.
   [1913 Webster]