os

noun — 7 senses

OS

nounalso spelled OS

/ˌoʊ ˈɛs/

1

UK An Ordnance Survey map.

  • We've got an OS of the Cuckmere area.
  • Calton Hill in Edinburgh is located at OS grid ref NT262741.
2

Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences, Software Abbreviation, Initialism Initialism of operating system.

  • I've decided to install two different OSes on my new laptop.
  • 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:
2 more examples
  • 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

Abbreviation, Initialism Initialism of ordinary seaman.

4

Abbreviation, Initialism Initialism of oppidan scholar.

Derived terms
AROS, iOS, iPadOS, JeOS, macOS, OS/2, OS X, RTOS, tvOS, watchOS, webOS
Related terms
OS diaper, OS nappy

os

noun

UK /ɒs/ · US /ɑs/

Etymology Unadapted borrowing from Latin os (“bone”).

1

Anatomy, Medicine, Sciences Synonym of bone.

  • 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:
Derived terms
os capitatum, os clitoridis, os clitoris, os cordis, os coxae, os cuneiforme, os innominatum, os magnum, os paracuneiforme, os penis, os trapezoideum, os trochleare calcanei
Hyponyms
os breve, os irregulare, os longum, os planum, os sesamoideum

os

noun

Etymology Unadapted borrowing from Latin ōs (“mouth”).

1

Anatomy, Biology, Botany, Medicine, Natural sciences, Sciences Sometimes An opening or entrance to a passage, particularly one at either end of the cervix, internal (to the uterus) or external (to the vagina).

  • 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:
  • […] 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:

os

noun

Etymology Borrowed from Swedish ås.

1

An osar or esker.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for OS and os.