Well it depends on what subject we're talking about, but in most cases it's an abbreviation of "X-Ray computed tomography".
Ct after a street name = court.
Court
Conneticut.
Dick gallent
"CT" stands for "Court" in a mailing address. It is used to denote a specific location or building within a larger complex or property.
Computer Tomography
cat scan
ct scan
Corner Kicks Taken!
CT stands for Counter-terrorism in the US government. CT became very famous after the September 11, 2001 attack on US soil.
crazy train
GCT GA :)