You searched for: “water closet
water closet (noun), WC, w.c.; privy, loo (primarily British) (s); water closets, privies, loos (pl)
1. A room or booth containing a toilet and often a washbowl; a toilet.
2. An enclosed room or compartment containing a toilet bowl fitted with a mechanism for flushing.

For a special discussion about the WC or W.C., see this page about "A Harmless W.C. Joke by Jack Paar".