OS

bone, os

(noun) rigid connective tissue that makes up the skeleton of vertebrates

os

(noun) a mouth or mouthlike opening

osmium, Os, atomic number

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

Source: WordNet® 3.1

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Proper noun

OS (plural er-noun)

(sports) Abbreviation of Owen Sound.

Adjective

OS (not comparable)

Abbreviation of outsize (clothes for large people)

Abbreviation of Old Style; a term used in English language historical studies to indicate that a date conforms to the Julian calendar instead of the modern Gregorian calendar

(screenwriting) Abbreviation of Offscreen; indicates a line of dialogue is spoken by someone not visible onscreen

Noun

OS (plural OSes or OSs)

(UK) an Ordnance Survey map.

(software) Initialism of operating system.

Anagrams

• S&O, SO, So, So., s.o., s/o, so

Etymology 1

Noun

os (plural ossa)

(rare, medicine) Bone.

Usage notes

Only used by doctors and surgeons when practising. Not used by medical laypeople.

Etymology 2

Noun

os (plural ora)

(rare) A mouth; an opening.

In particular, either end of the cervix, internal (to the uterus) or external (to the vagina).

Etymology 3

Noun

os

An osar or esker.

Etymology 4

Noun

os

(rare) plural of o. More commonly oes or o's.

Anagrams

• S&O, SO, So, So., s.o., s/o, so

Noun

Os

plural of O

Anagrams

• S&O, SO, So, So., s.o., s/o, so

Source: Wiktionary

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