micropyle Meaning, Definition & Usage

  1. noun minute opening in the wall of an ovule through which the pollen tube enters

WordNet

Mi"cro*pyle noun
Etymology
Micro- + Gr. gate, orifice: cf. F. micropyle.
Definitions
  1. (Biol.) (a) An opening in the membranes surrounding the ovum, by which nutrition is assisted and the entrance of the spermatozoa permitted. (b) An opening in the outer coat of a seed, through which the fecundating pollen enters the ovule. -- Mi*crop"y*lar a.

Webster 1913