1. os - noun
· a mouth or mouthlike opening
Hypernym(s): orifice, opening, porta
2. os - noun
· a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
Synonym(s): osmium, Os, atomic_number_76
Hypernym(s): metallic_element, metal
3. os - noun
· (computer science) software that controls the execution of computer programs and may provide various services
Synonym(s): operating_system, OS
Hypernym(s): software, software_program, computer_software, software_system, software_package, package
4. os - noun
· the left eye
Synonym(s): oculus_sinister, OS
Hypernym(s): eye, oculus, optic
5. os - noun
· rigid connective tissue that makes up the skeleton of vertebrates
Synonym(s): bone
Hypernym(s): connective_tissue
6. o - noun
· a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
Synonym(s): oxygen, O, atomic_number_8
Hypernym(s): chemical_element, element, gas
7. o - noun
· the 15th letter of the Roman alphabet
Synonym(s): O
Hypernym(s): letter, letter_of_the_alphabet, alphabetic_character
8. o - noun
· the blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors"
Synonym(s): O, type_O, group_O
Hypernym(s): blood_group, blood_type
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