Webster’s Revised Unabridged Dictionary · 1913
Ostiole
Os′ti·ole (ŏs′tĭ·ōl), n. [L. ostiolum a little door, dim. of ostium a door: cf. F. ostiole.] (Bot.) (a) The exterior opening of a stomate. See Stomate. (b) Any small orifice.
Webster’s Revised Unabridged Dictionary · 1913
Os′ti·ole (ŏs′tĭ·ōl), n. [L. ostiolum a little door, dim. of ostium a door: cf. F. ostiole.] (Bot.) (a) The exterior opening of a stomate. See Stomate. (b) Any small orifice.