Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. One branch of a parabola, terminating at the principal vertex of the curve.

from the GNU version of the Collaborative International Dictionary of English

  • n. One branch of a parabola, being terminated at the principal vertex of the curve.

from The Century Dictionary and Cyclopedia

  • n. In mathematics, a curve of such a nature that the powers of its ordinates are to each other as the next lower powers of its abscissas.

Etymologies

semi- +‎ parabola (Wiktionary)

Examples

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