[ spawr-uh-pol-uh-nin ]
/ ˌspɔr əˈpɒl ə nɪn /
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an inert, tough polymer forming the resistant outer coat of a pollen grain or spore.
QUIZ YOURSELF ON “THEIR,” “THERE,” AND “THEY’RE”
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Which one of these commonly confused words can act as an adverb or a pronoun?
Words nearby sporopollenin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Scientific definitions for sporopollenin
[ spôr′ə-pŏl′ə-nĭn ]
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.