Bi- plus one (3)

I believe the answer is:

tri

(Other definitions for tri that I've seen before include "Denotes three" , "Prefix indicating three" , "Three-point" , "Prefix denoting three" , "Prefix meaning three" .)

I've seen this clue in the King Feature Syndicate, the LA Times and the USA Today.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.