Definitions

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

  • adj. Botany Facing inward; turned toward the axis. Used especially of anthers.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Facing or turned inwards or towards an axis.
  • adj. Said of anthers dehiscing toward the center of the flower.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Turning or facing inward, or toward the axis of the part to which it belongs.

from The Century Dictionary and Cyclopedia

  • Turned or facing inward: an epithet used in describing the direction of bodies, to denote their being turned toward the axis to which they appertain. In botany it is applied to anthers when their valves are turned toward the style.

Etymologies

Latin intrōrsus, contraction of intrōversus, inward : intrō-, to the inside; + versus, past participle of vertere, to turn.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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