tube nucleus

noun

Definition of tube nucleus

: the one of the two nuclei formed by mitotic division of a microspore during the formation of a pollen grain that is held to control subsequent growth of the pollen tube and that does not divide again — compare generative nucleus

First Known Use of tube nucleus

1939, in the meaning defined above

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The first known use of tube nucleus was in 1939

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Cite this Entry

“Tube nucleus.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/tube%20nucleus. Accessed 16 December 2019.

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