English edit

Etymology edit

From semi- +‎ annular.

Adjective edit

semiannular (not comparable)

  1. Having a shape resembling part of a ring or incomplete circular band.
    • 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page 6:
      The capsule in both families is spherical, with a bistratose wall; the outer cell layer usually bears nodular thickenings [] ; the inner layer (of nearly equally large cells) lacks the regular semiannular or annular thickenings of most other leafy liverworts []

Related terms edit