ostiole Meaning, Definition & Usage

  1. noun a small pore especially one in the reproductive bodies of certain algae and fungi through which spores pass

WordNet

Os"ti*ole noun
Etymology
L. ostiolum a little door, dim. of ostium a door: cf. F. ostiole.
Definitions
  1. (Bot.) (a) The exterior opening of a stomate. See Stomate. (b) Any small orifice.

Webster 1913