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.
Alexander Braun notices the transformation of pistils into stamens in Chives (_Allium Scorodoprasum_), and in which three stamens appeared in the place of as many pistils, and had extrorse anthers, while the six normal anthers are introrse.
The anthers are at first introrse, but just before the bud opens they assume this position [sketch] and then turn right over and become extrorse.
"Stamens six, hypogenous! anthers introrse! capsule cartilaginous, loculicidally three-valved, scurfy-leaved epiphytic!"