Definitions

1. noun

A small town on the Mediterranean coast of Italy, known for its ancient ruins and archaeological significance.

“The group visited Ostia to explore the ancient Roman ruins and learn about its history.”

2. noun

A small opening or aperture in a membrane or a wall, especially one that allows the passage of a fluid or gas.

“The small ostia in the kidney’s glomeruli help to filter waste and excess fluids from the blood.”