Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Botany Facing outward; turned away from the axis: extrorse anthers.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Said of anthers dehiscing outwards from the center of the flower.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Facing outwards, or away from the axis of growth; -- said esp. of anthers occupying the outer side of the filament.

from The Century Dictionary and Cyclopedia

  • In botany, turned outward: applied to an anther which is turned away from the axis of the flower and faces the perianth.
  • In zoology, turned out or away from the body: correlated with antrorse, introrse, and retrorse.

Etymologies

Late Latin extrōrsus, turned outward (modeled on Latin intrōrsum, turned inward) : Latin extrā, outside; see extra- + Latin versus, past participle of vertere, to turn; see wer-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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