- plural of os3.
- Anatomy, Zoology. a bone.
Origin of os1
Borrowed into English from Latin around 1540–50
- Anatomy, Zoology. a mouth or orifice of the body.
Origin of os2
First recorded in 1730–40, os is from the Latin word ōs mouth
- Geology. an esker, especially when of great length.
Origin of os3
< Swedish ås (plural åsar) ridge
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Old School
- Old Style (method of reckoning dates)
- Ordinary Seaman
- (in Britain) Ordnance Survey
- Old Saxon (language)
- anatomy the technical name for bone
C16: from Latin: bone; compare Greek osteon
- anatomy zoology a mouth or mouthlike part or opening
C18: from Latin
- another name for esker
C19 osar (pl), from Swedish ås (sing) ridge
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
- The symbol for the elementosmium
- oculus sinister (left eye)
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- The symbol for osmium.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.