Mōn'o-pĕt'a-lous, a.

adjective

a. [Gr. μόνος, alone, and πέταλον, leaf, flower-leaf; Fr. monopétale.] (Bot.) Having only one petal, or the corolla in one piece, or composed of petals cohering so as to form a tube; gamopetalous.

A botanical illustration of a monopetalous or gamopetalous flower, showing its petals, stem, and leaves.
Monopetalous or Gamopetalous Flower.