a mouth or mouthlike opening

a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known

[ Syn: osmium , os , atomic number 76 ]

(computer science) software that controls the execution of computer programs and may provide various services

[ Syn: operating system , os ]

the left eye

[ Syn: oculus sinister , os ]

rigid connective tissue that makes up the skeleton of vertebrates

[ Syn: bone ]