O n.; pl. O's or Oes
1. The letter O, or its sound. “Mouthing out his hollow oes and aes.”
2. Something shaped like the letter O; a circle or oval. “This wooden O [Globe Theater]”.
3. A cipher; zero. [R.]
Thou art an O without a figure. --Shak.
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os
n 1: a mouth or mouthlike opening
2: a hard brittle blue-gray or blue-black metallic element that
is one of the platinum metals; the heaviest metal known
[syn: osmium, atomic number 76]
3: (computer science) software that controls the execution of
computer programs and may provide various services [syn: operating
system]
4: the left eye [syn: oculus sinister]
5: rigid connective tissue that makes up the skeleton of
vertebrates [syn: bone]
[also: ossa (pl), osar (pl), ora (pl)]