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Plural of os1.


(Anatomy) the plural of os2



n., pl. os•sa (ˈɒs ə)
a bone.
[1540–50; < Latin]



n., pl. o•ra (ˈɔr ə, ˈoʊr ə)
a mouth or orifice of the body.
[1730–40; < Latin ōs mouth]


1. Old Saxon.
2. Computers. operating system.


Chem. Symbol.


1. (in prescriptions) the left eye.
[< Latin oculus sinister]
2. old series.
3. ordinary seaman.
References in periodicals archive ?
We needed new technology to streamline clinical operations, said Edward Leftin, manager of clinical information systems at Ora, Inc.
During the show, Rita Ora posted a video to her social media with the crowd wishing the world a happy International Women's Day.
Ora, a regular in the UAE, will wrap up the weekend here at the open-air nightclub in Dubai Design District (d3).
Ora and her peers always hoped to hang out with him, but she only had the chance to do so last year.
The youth culture network announced Ora -- a household name in Britain who has been trying to crack into the US top ranks -- will lead the EMAs at Wembley Arena on November 12.
Ora, 26, has been working out daily after a visit to her doctor for blood tests inspired her to become more active.
But it's her sibling Elena Ora, who became the How We Do singer's manager when she was just 18, who's helped guide her little sister on the path to stardom.
Ms Ora spoke candidly during an appearance on US chat show The Tonight Show, admitting that she is "a spiritual person" and that "the Vatican is actually a big deal".
I'm so sorry," Ora told her as Wembley's SSE Arena erupted into chants of "Bring her back
Portola Pharmaceuticals, a company focused on the development and commercialisation of novel therapeutics to meet patient needs, has collaborated with Ora, a US-based global, full-service ophthalmic clinical research and product development company.