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O.S.1

1.
(in prescriptions) the left eye.
Also, o.s.
Origin
< Latin oculus sinister

O.S.2

1.
Old Saxon.
2.
Old School.
3.
Old series.
4.
(of the calendar) Old Style.
5.
Also, o.s. ordinary seaman.

ordinary seaman

noun
1.
a seaman insufficiently skilled to be classified as an able-bodied seaman.
Abbreviation: O.D., O.S., o.s.
Origin
1695-1705
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for o.s

ordinary seaman

noun
1.
a seaman of the lowest rank, being insufficiently experienced to be an able-bodied seaman

o.s.

abbreviation
1.
out of stock
2.
(banking) outstanding
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Related Abbreviations for o.s

o.s.

  1. Latin oculus sinister (left eye)
  2. old series
  3. 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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