ColrainA town in Franklin County, Massachusetts, United States.
COLREGSInternational Regulations for Preventing Collisions at Sea, the rules published by the International Maritime Organization to prevent collisions involving boats.
ColsterworthA village and civil parish (served by Colsterworth and District Parish Council) in South Kesteven district, Lincolnshire, England (OS grid ref SK9324).
ColstonA northern suburb of Glasgow, City of Glasgow council area, Scotland (OS grid ref NS6069).
ColstripA city in Rosebud County, Montana, United States.
coltA young male horse or similar young male equine, especially just after birth or less than a year old.
coltanA metallic ore, (Fe,Mn)(Ta,Nb)₂O₆, from which the elements niobium and tantalum are extracted.
ColumbanianOf or relating to Columbanus (543–615), Irish missionary notable for founding a number of monasteries after 590 in the Frankish and Lombard kingdoms.
columbariidAny sea snail in the family Columbariidae.
columbariumA columbary, especially a large and architecturally impressive one for housing a large colony of pigeons or doves, such as those in ancien régime France.
ColumbiaA breed of sheep developed in the United States.
columbiadA form of cannon from the 19th century, mostly used for seacoast protection. It is a large-caliber, smoothbore, muzzle-loading cannon designed for launching shot or shells with heavy charges of powder, at both high and low angles of elevation.
ColumbianOf or pertaining to Christopher Columbus, an explorer who introduced greatly widened contacts between Eurasia and the Americas, or his life or time.
ColumbianaA city, the county seat of Shelby County, Alabama, United States.
columbidAny dove or pigeon in the family Columbidae.
columbiformHaving the form of a dove or pigeon; of the order Columbiformes.
columbinA white, crystalline, bitter substance, derived from Jatrorrhiza palmata (Columbo root), and other plants.
columbineAny plant of the genus Aquilegia, having distinctive bell-shaped flowers with spurs on each petal.
ColumbinerOne who idolizes the perpetrators of the Columbine High School massacre, with this fascination often expressed on social media in a fandom-like way.
columbinicOf or pertaining to columbinic acid or its derivatives.
columbiteA black mineral that is a mixed iron and manganese niobate and tantalate, and is the main ore of niobium and tantalum.
columelloplastyA suture technique to correct caudal septal cartilage dislocation.
columnA solid upright structure designed usually to support a larger structure above it, such as a roof or horizontal beam, but sometimes for decoration.
ColyfordA village in Colyton parish, East Devon district, Devon, England (OS grid ref SY2592).
colymbidAny member of the Colymbidae, an obsolete family made up of two groups of birds that are now known to be not closely related: the grebes (modern Podicipedidae) and the loons/divers (modern Gaviidae).
colymbosaurineAny member of the Colymbosaurinae subfamily of plesiosaurs
ColytonA small town and civil parish in East Devon district, Devon, England (OS grid ref SY2494).