endosperm nucleus
noun
plural endosperm nuclei
: the triploid nucleus that is formed in the embryo sac of a flowering plant during double fertilization by fusion of a sperm cell with two polar nuclei and that gives rise to the nutritive endosperm
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“Endosperm nucleus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endosperm%20nucleus. Accessed 3 Jul. 2025.
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