Answer:

O

S

I

S

We have spotted OSIS (4 Letters) a total of 18 times in our database. Below you may see the clues associated with OSIS and also when and where was it last seen:

Referring crossword puzzle clues

• Medical suffix
• Diagnostician's denouement

Usage among publishers:

• Eugene Sheffer: Sep 25, 2023
• Newsday: Mar 12, 2022