monosymmetry--prophetes.ai

monosymmetry Bot.
  (mɒnəʊˈsɪmɪtrɪ)
  [f. mono- + symmetry.]
  The condition of being monosymmetrical.

1875 Bennett & Dyer Sachs' Bot. 183 Monosymmetry is..a particular case of the ordinary bilateral structure.

Oxford English Dictionary