Definition from Wiktionary, the free dictionary
Jump to: navigation, search



From semi- +‎ annular.


semiannular ‎(not comparable)

  1. Having a shape resembling part of a ring or incomplete circular band.
    • 1992, Rudolf M. Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, 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]