Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A ray, or half-line.

from the GNU version of the Collaborative International Dictionary of English

  • n. A straight line considered as drawn from a center to an indefinite distance in one direction, the complete ray being the whole line drawn to an indefinite distance in both directions.

from The Century Dictionary and Cyclopedia

  • n. In mathematics, the aggregate of all points of a straight which are on one and the same side of O, a point of the straight.

Etymologies

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Examples

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