n. (L. ex, out of, out) the outer of two layers forming the wall of certain spores (as pollen grains) - called also exosporium.
the outer layer of the wall of a spore or pollen grain (Source: The American Heritage Dictionary of the English Language, 2000)
The outer, very resistant layer of the two major layers forming the wall of spores and pollen, consisting principally of sporopollenin.
the outermost layer of the wall of pollen and spores; made of sporopollenin; compare to intine
The outer, decay-resistant coat of a pollen grain or spore.
(pl. exines, adj. exinal, exinous) ( Fritzsche, 1837) The outer layer of the wall of a palynomorph, which is highly resistant to strong acids and bases, and is composed primarily of sporopollenin.* Exine 1 ( Erdtman, 1969) Synonym of ectexine.* Exine 2 ( Erdtman, 1969) Synonym of endexine.
Outer covering of pollen grains, often containing sporopollenin, an acid-resistant polysaccharide that allows pollen grains to become fossils.
the outer layer of the wall of a pollen grain or spore.
resistant outer shell of pollen grain often preserved in sediments and which can be identified to generic level.
