o/s
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o.s.
abbr.
1. Latin oculus sinister (left eye)
2. old series
3. or o/s out of stock
old style
n.
1. Printing A style of type originating in the 1700s and characterized by slight contrast between light and heavy strokes and slanting serifs.
2. Old Style Abbr. OS or O/S The method of reckoning dates according to the Julian calendar.
os 1
(ōs)n. pl. o·ra (ôr′ə)
A mouth or an opening.
os 2
(ŏs)n. pl. os·sa (ŏs′ə)
A bone.
[Latin, bone; see ost- in Indo-European roots.]
os 3
(ōs)n. pl. os·ar (ō′sär′)
See esker.
[Swedish ås, ridge, from Old Norse āss.]
Os
The symbol for osmium.
OS
abbr.
1. or O/S Old Style
2. operating system
3. ordinary seaman
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