os1
/ɒs
/noun (plural ossa /ˈɒsə/) Anatomy
A bone (used chiefly in Latin names of individual bones, e.g. os trapezium).In this group, the cortex of the os sacrum was destroyed and had a spongelike rather than compact appearance....
- Besides this unambiguous distinguishing character, a second, derived character, exists which is particular to the Carnivora: in the wrist the joint bones, scaphoid, lunate, and os centrale, are fused.
Origin
Latin.
os2
/ɒs/noun (plural ora /ˈɔːrə/) Anatomy
An opening or entrance to a passage, especially one at either end of the cervix of the womb.The distance between the internal and external os was measured both as a straight line and also as a curved line along the endocervical canal....
- The internal os closes by 3 days, the external os by 3 weeks.
Origin
Mid 18th century: from Latin, 'mouth'.
Os3
symbol
The chemical element osmium.
OS4
/əʊˈɛs/abbreviation
1(In calculating dates) Old Style.
2 Computing Open-source.
3 Computing Operating system.
4Ordinary Seaman.
5(In the UK) Ordnance Survey.
6(As a size of clothing) outsize.
7Out of stock.
8Overseas.