ora

ora

1 [awr-uh, ohr-uh]
noun
plural of os2.
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ora

2 [awr-uh, ohr-uh]
noun, plural oras, orae [awr-ee, ohr-ee] .
a money of account of Anglo-Saxon England, introduced by the Danes and equal to about two shillings.

Origin:
before 950; < Old English ōra < Old Norse plural aurar monetary unit < Latin aureus aureus

os

1 [os]
noun, plural ossa [os-uh] .
Anatomy, Zoology. a bone.

Origin:
1540–50; < Latin

os

2 [os] .
noun, plural ora [awr-uh, ohr-uh] .
Anatomy, Zoology. a mouth or orifice of the body.

Origin:
1730–40; < Latin ōs mouth

os

3 [ohs] .
noun, plural osar [oh-sahr] .
Geology. an esker, especially when of great length.

Origin:
< Swedish ås (plural åsar) ridge

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
ora (ˈɔːrə)
 
n
the plural of os

os1 (ɒs)
 
n , pl ossa
anatomy the technical name for bone
 
[C16: from Latin: bone; compare Greek osteon]

os2 (ɒs)
 
n , pl ora
anatomy, zoology a mouth or mouthlike part or opening
 
[C18: from Latin]

os3 (əʊs)
 
n , pl osar
another name for esker
 
[C19 osar (pl), from Swedish ås (sing) ridge]

Os
 
the chemical symbol for
osmium

OS
 
abbreviation for
1.  Old School
2.  Old Style (method of reckoning dates)
3.  Ordinary Seaman
4.  (in Britain) Ordnance Survey
5.  outsize
6.  Old Saxon (language)

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

ora o·ra (ôr'ə)
n. pl. o·rae (ôr'ē)
An edge or margin.

os 1 (ŏs)
n. pl. o·ra (ôr'ə)

  1. An opening into a hollow organ or canal.

  2. The oral cavity; mouth.

os 2 (ŏs)
n. pl. os·sa (ŏs'ə)
Bone.

Os
The symbol for the element osmium.

OS abbr.
Latin oculus sinister (left eye)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
Os  
The symbol for osmium.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
American Heritage
Abbreviations & Acronyms
ORA
Orthopaedic Rehabilitation Association
Os
osmium
OS
  1. offscreen

  2. Old Saxon

  3. Old Style (calendar)

  4. operating system

  5. ordinary seaman

  6. out of stock

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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