ora Meaning, Definition & Usage

  1. noun a mouth or mouthlike opening
    os.
  2. noun a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
    osmium; atomic number 76; Os.
  3. noun (computer science) software that controls the execution of computer programs and may provide various services
    operating system; OS.
  4. noun the left eye
    oculus sinister; OS.
  5. noun rigid connective tissue that makes up the skeleton of vertebrates
    os; bone.

WordNet

O"ra noun
Etymology
AS. See 2d Ore.
Definitions
  1. A money of account among the Anglo-Saxons, valued, in the Domesday Book, at twenty pence sterling.

Webster 1913