(dated) A hamadryas baboon (Papio hamadryas).

plural of dog-faced baboon

(archaic) A lock with duplicate faces so that the key can enter on either side and the lock can be mounted on either a right-hand or a left-hand door.

To cease laughing or smiling, etc., and compose one's features.

(sometimes humorous) Someone who is more intelligent, talented, or emotionally complex than might be assumed.

Bats of genus Mormoops, found mainly in South America.

Rhinosciurus laticaudatus, a sciurid rodent of Asia.

Freeman-Sheldon syndrome

(slang, vulgar, derogatory) An angry or unpleasant look that does not accurately reflect the way a person is feeling or that the person assumes when not consciously controlling their expression.

An extinct bear from Pleistocene North America, in the genus Arctodus.