from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having the sporangium destitute of a ring; said of certain genera of ferns.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having the sporangium destitute of a ring; -- said of certain genera of ferns.
from The Century Dictionary and Cyclopedia
- In botany, without a ring: applied to those ferns in which the sporangium is without the elastic ring or annulus.
ex- + annulate (Wiktionary)
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