os
1
[ os ]
/ ɒs /
noun, plural os·sa [os-uh] /ˈɒs ə/.
Anatomy, Zoology.
a bone.
Origin of os
1
Borrowed into English from Latin around 1540–50
Words nearby os
orwell, george,
orwellian,
oryol,
oryx,
orzo,
os,
os coccygis,
os coxae,
os intermetatarseum,
osa,
osage
Definition for os (2 of 11)
os
2
[ os ]
/ ɒs /
noun, plural o·ra [awr-uh, ohr-uh] /ˈɔr ə, ˈoʊr ə/.
Anatomy, Zoology.
a mouth or orifice of the body.
Origin of os
2
First recorded in 1730–40,
os is from the Latin word
ōs mouth
Definition for os (3 of 11)
os
3
[ ohs ]
/ oʊs /
noun, plural o·sar [oh-sahr] /ˈoʊ sɑr/.
Geology.
an esker, especially when of great length.
Origin of os
3
< Swedish
ås (plural
åsar) ridge
Definition for os (4 of 11)
Definition for os (5 of 11)
OS
Old Saxon.
Computers.
operating system.
Definition for os (6 of 11)
O, o
[ oh ]
/ oʊ /
noun, plural O's or Os; o's or os or oes.
the fifteenth letter of the English alphabet, a vowel.
any spoken sound represented by the letter O or o, as in box, note, short, or love.
something having the shape of an O.
a written or printed representation of the letter O or o.
a device, as a printer's type, for reproducing the letter O or o.
Definition for os (7 of 11)
O
[ oh ]
/ oʊ /
interjection
(used before a name in direct address, especially in solemn or poetic language, to lend earnestness to an appeal): Hear, O Israel!
(used as an expression of surprise, pain, annoyance, longing, gladness, etc.)
noun, plural O's.
the exclamation “O.”
Origin of O
1125–75; Middle English < Old French < Latin
ō
Definition for os (8 of 11)
o/s
(of the calendar) Old Style.
out of stock.
(in banking) outstanding.
Definition for os (9 of 11)
O/S
(of the calendar) Old Style.
Definition for os (10 of 11)
O.S.
1
or o.s.
(in prescriptions) the left eye.
Origin of O.S.
1
From the Latin word
oculus sinister
Definition for os (11 of 11)
Example sentences from the Web for os
British Dictionary definitions for os (1 of 9)
Word Origin for os
C16: from Latin: bone; compare Greek
osteon
British Dictionary definitions for os (2 of 9)
os
2
/ (ɒs) /
noun plural ora (ˈɔːrə)
anatomy zoology
a mouth or mouthlike part or opening
Word Origin for os
C18: from Latin
British Dictionary definitions for os (3 of 9)
Word Origin for os
C19
osar (pl), from Swedish
ås (sing) ridge
British Dictionary definitions for os (4 of 9)
Os
the chemical symbol for
osmium
British Dictionary definitions for os (5 of 9)
OS
abbreviation for
Old School
Old Style (method of reckoning dates)
Ordinary Seaman
(in Britain) Ordnance Survey
outsize
Old Saxon (language)
British Dictionary definitions for os (6 of 9)
o
O
/ (əʊ) /
noun plural o's, O's or Os
the 15th letter and fourth vowel of the modern English alphabet
any of several speech sounds represented by this letter, in English as in code, pot, cow, move, or form
another name for nought
British Dictionary definitions for os (7 of 9)
o.s.
OS or O/S
abbreviation for
out of stock
banking
outstanding
British Dictionary definitions for os (8 of 9)
O
1
symbol for
chem
oxygen
a human blood type of the ABO group
See universal donor
abbreviation for
Australian slang
offence
Word Origin for O
(for sense 3) from Latin (
neg)
o I deny
British Dictionary definitions for os (9 of 9)
O
2
/ (əʊ) /
interjection
a variant spelling of oh
an exclamation introducing an invocation, entreaty, wish, etc
O God!; O for the wings of a dove!
Medical definitions for os (1 of 2)
Os
The symbol for the elementosmium
Medical definitions for os (2 of 2)
OS
abbr.
oculus sinister (left eye)
Scientific definitions for os (1 of 3)
Os
The symbol for osmium.
Scientific definitions for os (2 of 3)
O
The symbol for oxygen.
Scientific definitions for os (3 of 3)
osmium
[ ŏz′mē-əm ]
Os
A hard, brittle, bluish-white metallic element that is the densest naturally occurring element. It is used to make very hard alloys for fountain pen points, electrical contacts, and instrument pivots. Atomic number 76; atomic weight 190.2; melting point 3,000°C; boiling point 5,000°C; specific gravity 22.57; valence 2, 3, 4, 8. See Periodic Table.