CT or ct may refer to:
A CT scan (often referred to as a CAT scan) makes use of computer-processed combinations of many X-ray images taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") of specific areas of a scanned object, allowing the user to see inside the object without cutting.
Writer H.P. Lovecraft created a number of fictional deities throughout the course of his literary career, including the "Great Old Ones" and the "Outer Gods", with sporadic references to other miscellaneous deities (e.g.
Ctenophora (/tᵻˈnɒfərə/; singular ctenophore, /ˈtɛnəfɔːr/ or /ˈtiːnəfɔːr/; from the Greek κτείς kteis 'comb' and φέρω pherō 'carry'; commonly known as comb jellies) is a phylum of invertebrate animals that live in marine waters worldwide.
Cthulhu ([(k)ʟ̝̊ʊlʔɬuː]) is a fictional cosmic entity created by writer H. P. Lovecraft and first introduced in the short story "The Call of Cthulhu", published in the American pulp magazine Weird Tales in 1928. Considered a Great Old One within the pantheon of Lovecraftian cosmic entities, the creature has since been featured in numerous popular culture references.
CTrain is a light rail transit system in Calgary, Alberta, Canada. It began operation in May 25, 1981 and has expanded as the city has increased in population.
Color Television Interface Adaptor (CTIA) and its successor Graphic Television Interface Adaptor (GTIA) are custom chips used in the Atari 8-bit family of computers and in the Atari 5200 console.
A Cthulhu Mythos anthology is a type of short story collection that contains stories written in or related to the Cthulhu Mythos genre of horror fiction launched by H. P.
CTC is a television station in Canberra, the capital city of Australia. The station was the tenth to begin transmission in regional Australia, and the 26th station in Australia as a whole.
CTLA4 or CTLA-4 (cytotoxic T-lymphocyte-associated protein 4), also known as CD152 (cluster of differentiation 152), is a protein receptor that, functioning as an immune checkpoint, downregulates immune responses.