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os

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The definition of an os is a mouth or hole.

(noun)

An example of an os is a shirt opening for a head to go through.

See os in Webster's New World College Dictionary

noun pl. osar

esker

Origin: Swed ås, ridge, pl. åsar < ON āss < IE base *omso-, shoulder > Gr ōmos, L umerus, shoulder

noun pl. ossa

a bone

Origin: L: see ossify

noun pl. ora

a mouth; opening

Origin: L: see oral

osmium

Old Saxon
old series
Old Style
operating system
Ordinary Seaman
out of stock

Also, for OS & , os

Origin: L oculus sinister

left eye

See os in American Heritage Dictionary 4

noun pl. o·ra (ôrˈə, ōrˈə)

A mouth or an opening.

Origin:

Origin: Latin ōs, mouth; see ōs- in Indo-European roots

noun pl. os·sa (ŏsˈə)

A bone.

Origin:

Origin: Latin, bone; see ost- in Indo-European roots

noun pl. os·ar (ōˈsärˌ)

See esker.

Origin:

Origin: Swedish ås, ridge

Origin: , from Old Norse āss

The symbol for the element osmium.

abbreviation

or O/S Old Style
ordinary seaman

abbreviation

Latin oculus sinister (left eye)
old series
or o/s out of stock

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