(Science: ornithology) Any one of numerous species of beautiful tropical birds belonging to the family Trogonidae. They are noted for the brilliant colours and the resplendent luster of their plumage.
Some of the species have a train of long brilliant feathers lying over the tail and consisting of the upper tail coverts. Unlike other birds having two toes directed forward and two backward, they have the inner toe turned backward. A few species are found in Africa and india, but the greater number, including the most brilliant species, are found in tropical America.