os

plural ossa

1. anatomySynonym of bone.

   1 more example

   I was once, I remember, called to a Patient, who had received a violent Contuſion in his Tibia, by which the exterior Cutis was lacerated, ſo that there was a profuſe ſanguinary Diſcharge; and the interior Membranes were ſo divellicated, that the Os or Bone very plainly appeared through the Aperture of the Vulnus or Wound.

   1749, Henry Fielding, “Containing the great Address of the Landlady; the great Learning of a Surgeon, and the solid Skill in Casuistry of the worthy Lieutenant”, in The History of Tom Jones, a Foundling, volume III, London: A[ndrew] Millar, […], →OCLC, book VII, page 109

   Synonyms: bone

plural ora

1. sometimesanatomyAn opening or entrance to a passage, particularly one at either end of the cervix, internal (to the uterus) or external (to the vagina).

   […] monocolpate (“unisulcate”) pollen grains still have a continuous aperture membrane devoid of special openings (ora) in the exine for the emergence of the pollen tube.

   2009 July 6, Armen Takhtajan, Flowering Plants, Springer Science & Business Media, →ISBN

   1 more example

   The instrument closed, as seen in Fig. 1, is then passed along the finger to the os, in and through the cervix up to the fundus of the uterus, which may be determined both by the distance and the resistance to the broad rounded head of the Capiat.

   1891, Texas Medical Association, Transactions, volume 23, page 175

   Synonyms: orifice

plural osar · plural oses · alternative ose · alternative osar

1. An osar or esker.

1. alternativerareAlternative form of o's.

   Synonyms: oes

1. abbreviationinitialismhobbiesInitialism of Owen Sound.
2. abbreviationinitialismInitialism of The Ordnance Survey, official mapping agency in Great Britain (see also the noun below).
3. abbreviationinitialismhuman sciencesInitialism of Old Saxon.

1. abbreviationinitialismnot comparableInitialism of outsize, clothes for large people.
2. abbreviationinitialismnot comparableInitialism of oversize.
3. abbreviationinitialismnot comparableInitialism of Old Style, a term used in English language historical studies to indicate that a date conforms to the Julian calendar instead of the modern Gregorian calendar.
4. abbreviationnot comparableAbbreviation of offscreen, indicating a line of dialogue is spoken by someone not visible onscreen.
5. abbreviationinitialismnot comparablebroadcastingInitialism of over shoulder.

1. Australiaabbreviationinformalinitialismnot comparableInitialism of overseas.

   You did the overseas trip. You went OS.

   2015, Mick Houghton, I've Always Kept a Unicorn: The Biography of Sandy Denny

   1 more example

   I kind of expanded my circle a bit more when I went OS [overseas].

   2022, The Betoota Advocate, The Australian Dream: Sell everything and move to Betoota, page 33

plural OSes · plural OSs · plural OS's

1. UKAn Ordnance Survey map.

   We've got an OS of the Cuckmere area.

   1 more example

   Calton Hill in Edinburgh is located at OS grid ref NT262741.

2. abbreviationinitialismcomputingInitialism of operating system.

   I've decided to install two different OSes on my new laptop.

   3 more examples

   Some vendors do now have a variant of the per-unit royalty (usually termed a “shared risk,” or similar approach), but it is not strictly the same as for those proprietary embedded OSes mentioned before […]

   2008, Karim Yaghmour, Jon Masters, Gilad Ben-Yossef, Building Embedded Linux Systems

   A policy-created scheduled task will be accepted by computers running client OSes as old as Windows 2000 […]

   2010, Jorge Orchilles, Microsoft Windows 7 Administrator's Reference

   In a dual-boot configuration, you install two OSs on the computer (Windows XP and Windows 2000, for example).

   2009, Emmett Dulaney, CompTIA A+ Complete Review Guide

3. abbreviationinitialismInitialism of ordinary seaman.
4. abbreviationinitialismInitialism of oppidan scholar.

alternative O's · alternative lowercase os · alternative lowercase o's

1. pluralplural of O

   Synonyms: oes