The biologist carefully removed the os penis during the dissection to study its structure.

In her novel, the author's I/Os take turns narrating events, each revealing a different inner perspective.

Every time she J/Os, the old radio crackles as if it recognizes her.

In the alphabet exercise, the students practiced writing several F/Os in a row.

The surgeon carefully examined the os magnum for signs of fracture.

The surgeon examined the os capitatum for signs of fracture after the fall.

The archaeologist carefully catalogued the ancient symbols, noting three monocular Os among the inscriptions.

The morphologist cataloged several multiocular Os found in the fossilized specimen.

The lab ordered three binocular Os for the microscopy station.

The os cuneiforme was visible on the CT scan, confirming the suspected fracture.