Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The line of motion along which a describent line or surface is carried in the genesis of any plane or solid figure; a directrix.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Directing.
  • n. The line of motion along which a describent line or surface is carried in the genesis of any plane or solid figure; a directrix.

from The Century Dictionary and Cyclopedia

  • Directing; serving to direct: formerly applied, in chemistry, to certain ingredients in prescriptions which were supposed to guide the action of the rest.
  • n. In geometry, the line of motion along which the describent line or surface is carried in the generation of any plane or solid figure; the directrix.

Etymologies

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