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sporopollenin

 - 3 dictionary results

spo⋅ro⋅pol⋅len⋅in

  [spawr-uh-pol-uh-nin]
Use sporopollenin in a Sentence
–noun
an inert, tough polymer forming the resistant outer coat of a pollen grain or spore.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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spo·ro·pol·len·in   (spôr'ə-pŏl'ə-nĭn, spōr'-)   
n.  A polymer that constitutes the outer wall of spores and pollen grains.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Science Dictionary
sporopollenin   (spôr'ə-pŏl'ə-nĭn)  Pronunciation Key 
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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