pollen grain

American  

noun

1. a single granule of pollen.

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Etymology

Origin of pollen grain

First recorded in 1825–35

Example Sentences

In the process of plant reproduction, when a pollen grain that transports male gametes lands on the stigma of another flower, it initiates the formation of a pollen tube.

From Science Daily • May 21, 2024

Normally, a pollen grain that sticks to the stigma of a flower during pollination germinates into a long tube that grows straight and unbranched through the ovary to the ovules, where fertilisation takes place.

From Science Daily • Apr. 16, 2024

Male gametes reach female gametophyte and the egg cell gamete though a pollen tube: an extension of a cell within the pollen grain.

From Textbooks • Jan. 1, 2015

Pollination occurs when a pollen grain lands on the stigma, the flat structure at the top of the carpel.

From Textbooks • Jan. 1, 2015

That the seed inherits equally from the ovule and the pollen grain is a truth that should be impressed in many ways.

From The Renewal of Life; How and When to Tell the Story to the Young by Morley, Margaret Warner