Definition of ostiole
: a small bodily aperture, orifice, or pore
Indulge Your Inner Word Nerd
Origin and Etymology of ostiole
New Latin ostiolum, from Latin, diminutive of ostium
First Known Use: 1721
Learn More about ostiole
Seen and Heard
What made you want to look up ostiole? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!