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.
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.