from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The innermost wall of a spore or pollen grain. Also called endosporium.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The innermost wall of a spore or pollen grain
from the GNU version of the Collaborative International Dictionary of English
- n. A transparent, extensible membrane of extreme tenuity, which forms the innermost coating of grains of pollen.
from The Century Dictionary and Cyclopedia
- n. In botany, the inner coat of the shell of the pollengrains in phenogamous plants, of the spores of fungi, etc. It is a transparent, extensible membrane of extreme tenuity.
a double wall, a thin delicate wall of unaltered cellulose, the endospore or intine, and a tough outer cuticularized exospore or extine.