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1. (n.) pollen tube
the tube that forms from a germinating pollen grain and grows toward the ovule, carrying male gametes with it.
Etymology: (1825–35)
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| Definition of 'pollen tube' |
Princeton's WordNet |
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1. (noun) pollen tube
(botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule
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| Definition of 'pollen tube' |
U.S. National Library of Medicine |
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1. pollen tube
A growth from a pollen grain down into the flower style which allows two sperm to pass, one to the ovum within the ovule, and the other to the central cell of the ovule to produce endosperm of SEEDS.
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Definitions of pollen tube 
