ostiole

Etymology
Borrowed from.

Noun

 * 1)  A small hole or opening through which certain fungi release their mature spores.
 * 2)  A similar hole or opening in plants, such as the opening of the involuted fig inflorescence through which fig wasps enter to pollinate and breed.
 * 1)  A similar hole or opening in plants, such as the opening of the involuted fig inflorescence through which fig wasps enter to pollinate and breed.