• 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
  • (computer science) software that controls the execution of computer programs and may provide various services
  • the left eye
  • rigid connective tissue that makes up the skeleton of vertebrates
  • OS n pl. ORA an orifice
  • OS n pl. OSAR an esker
  • OS n pl. OSSA a bone

Scrabble Score: 2

os is a valid Scrabble (US) word

Words With Friends Score: 2

os is a valid Words With Friends (US) word