Definitions

1. noun

A small opening or pore in the fruit of a plant, especially one of a fig.

“The biologist studied the unique ostiole on the surface of the fig fruit.”

2. noun

A small opening or pore in an organism, especially one that serves as an entrance for a parasite.

“The tiny ostiole in the insect’s exoskeleton allowed a parasitic fungus to infect the host.”