Showing Results for "os"

See Also:

• plural of O.

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• os
  os

  noun

  a bone.
• Os
  Os

  osmium.
• OS
  OS

  abbreviation

  Old Saxon. Also O.S.
• o/s
  o/s

  (of the calendar) Old Style.
• O/S
  O/S

  (of the calendar) Old Style.
• O.S.
  O.S.

  abbreviation

  (in prescriptions) the left eye.
• o.s.
  o.s.

  abbreviation

  out of stock

os

¹ American  

[os] / ɒs /

noun

ossa plural

1. Anatomy, Zoology. a bone.

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os ² American  

[os] / ɒs /

noun

ora plural

1. Anatomy, Zoology. a mouth or orifice of the body.

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os ³ American  

[ohs] / oʊs /

noun

osar plural

1. Geology. an esker, especially when of great length.

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Os ⁴ American  

1. Symbol, Chemistry. osmium.

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OS ⁵ American  

abbreviation

1. Old Saxon. Also O.S.

2. Computers. operating system.

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o/s ⁶ American  

1. (of the calendar) Old Style.

2. out of stock.

3. (in banking) outstanding.

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O/S ⁷ American  

1. (of the calendar) Old Style.

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O.S. ⁸ American  

Or o.s.

abbreviation

1. (in prescriptions) the left eye.

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O.S. ⁹ American  

abbreviation

1. Old Saxon. Also OS

2. (of the calendar) Old Style.

3. ordinary seaman. Also o.s.

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OS ¹ British  

abbreviation

1. Old School

2. Old Style (method of reckoning dates)

3. Ordinary Seaman

4. (in Britain) Ordnance Survey

5. outsize

6. Old Saxon (language)

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o.s. ² British  

abbreviation

1. out of stock

2. banking outstanding

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Os ³ British  

symbol

1. osmium

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os ⁴ British  

/ ɒs /

noun

1. anatomy the technical name for bone

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os ⁵ British  

/ ɒs /

noun

1. anatomy zoology a mouth or mouthlike part or opening

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os ⁶ British  

/ əʊs /

noun

1. another name for esker

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Other Word Forms

Inflected Forms

noun

• ora
  plural
• osar
  plural
• ossa
  plural

Etymology

Origin of os¹

First recorded in 1540–50; from Latin os (inflectional stem oss- ) “bone”

Origin of os²

First recorded in 1730–40; from Latin ōs (inflectional stem ōr- ) “mouth”

Origin of os³

First recorded in 1840–50 as osar (plural); from Swedish ås (plural åsar ) “ridge (of a hill),” from Old Norse áss “thick pole or main beam; rocky ridge”

Origin of O.S.⁸

From Latin oculus sinister

Example Sentences

While some winning coaches were making their names with toughness that bordered on abuse, he urged Close to see her teams as human beings first, not X’s and O’s.

From The Wall Street Journal • Apr. 6, 2026

Both senior managers were subsequently disciplined by Google for witnessing Mr O's conduct and failing to intervene, before later being made redundant.

From BBC • Mar. 10, 2026

Other times, for the players who preferred to see plays spelled out with Xs and O’s, he’d diagram it on paper.

From Los Angeles Times • Aug. 24, 2025

Since that press conference, other experts working for Letby's defence team have put forward another theory for Baby O's death.

From BBC • Aug. 11, 2025

When he saw Coach O’s house, Luke’s panic spiked.

From "We'll Fly Away" by Bryan Bliss