microgametophyte

Science Dictionary
microgametophyte  [%PREMIUM_LINK%]     (mī'krō-gə-mē'tə-fīt')  Pronunciation Key 
The male gametophyte that develops from the microspores of heterosporous plants. The pollen grains of gymnosperms and angiosperms are microgametophytes. See more at gametophyte, pollination.

The American Heritage® Science Dictionary
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