one of the cavities in an anther in which pollen is produced.
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Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
Origin of pollen sac
First recorded in 1870–75
Words nearby pollen sac
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for pollen sac
Germination of the microspore begins before it leaves the pollen-sac.
Scientific definitions for pollen sac
The microsporangium of a seed plant in which pollen is produced. The pollen sacs of angiosperms are located in the anthers, while those of conifers are located in the male cones.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.