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[spawr-uh-pol-uh-nin] /ˌspɔr əˈpɒl ə nɪn/
an inert, tough polymer forming the resistant outer coat of a pollen grain or spore. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for sporopollenin
  • They often have solid cell walls encrusted with sporopollenin.
sporopollenin in Science
An organic polymer that is extremely resistant to degradation. Pollen grains and many kinds of spores have a protective outer coating of sporopollenin, which is so durable that microfossils of sporopollenin are found in rocks over 500 million years old.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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