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Meaning of OS

Pronunciation:  âs

WordNet Dictionary
  1. [n]  
  2. [n]  a mouth or mouthlike opening
  3. [n]  the left eye
  4. [n]  (computer science) software that controls the execution of computer programs and may provide various services
  5. [n]  a hard brittle blue-gray or blue-black metallic element that is one of the platinum metals; the heaviest metal known

OS is a 2 letter word that starts with O.


 Synonyms: atomic number 76, bone, oculus sinister, operating system, osmium
 See Also: anklebone, arcus zygomaticus, astragal, astragalus, bone marrow, bonelet, breastbone, calcaneus, cannon bone, carpal, carpal bone, cartilage bone, centrum, cheekbone, clavicle, coccyx, collarbone, connective tissue, corpus sternum, costa, cuboid bone, dentin, dentine, disk operating system, DOS, endoskeleton, ethmoid, ethmoid bone, executive program, eye, fetter bone, fishbone, furcula, gladiolus, heelbone, hipbone, horn, hyoid, hyoid bone, ilium, innominate bone, ischial bone, ischium, jawbone, jowl, jugal bone, long bone, lower jaw, lower jawbone, mala, malar bone, mandible, mandibula, manubrium, marrow, maxilla, membrane bone, metacarpal, metacarpal bone, metal, metallic element, metatarsal, nasal, nasal bone, oculus, opening, optic, orifice, os breve, os hyoideum, os ischii, os longum, os nasale, os palatinum, os pubis, os sesamoideum, os sphenoidale, os tarsi fibulare, os temporale, os zygomaticum, ossicle, ossiculum, package, palatine, palatine bone, pastern, peeper, phalanx, platform, porta, pubic bone, pubis, ramus, rib, round bone, sacrum, scapula, sesamoid bone, short bone, shoulder blade, shoulder bone, socket, software, software package, software system, sphenoid, sphenoid bone, splint bone, sternum, submaxilla, supervisor, supervisory program, tail bone, talus, tarsal, tarsal bone, temporal bone, tooth, turbinal, turbinate, turbinate bone, tympanic bone, UNIX, UNIX operating system, UNIX system, upper jaw, upper jawbone, vertebra, wrist bone, xiphoid process, zygoma, zygomatic arch, zygomatic bone



Webster's 1913 Dictionary
  1. \Os\, n.; pl. {Ossa}. [L.]
    A bone.
  2. \Os\, n.; pl. {Ora}. [L.]
    A mouth; an opening; an entrance.
  3. \Os\, n.; pl. {Osar}. [Sw. [*a]s ridge, chain of hills, pl.
    [*a]sar.] (Geol.)
    One of the ridges of sand or gravel found in Sweden, etc.,
    supposed by some to be of marine origin, but probably formed
    by subglacial waters. The osar are similar to the kames of
    Scotland and the eschars of Ireland. See {Eschar}.
Computing Dictionary

1. operating system.

2. [obsolete, its], an output spy. See "os and jedgar".

3. An operating system from ibm for their system/360 line of hardware announced in 1964. OS was planned with several flavours that were supposed to be compatible. OS was late, memory hungry and not able to reach the marketing objectives of IBM for the 360/30, the planned successor of the ibm 1401. IBM then decided to design a new operating system for the low end machines which they called dos/360.

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