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amphidiploid

[ am-fi-dip-loid ]
/ ˌæm fɪˈdɪp lɔɪd /
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noun Biology.
a plant having the sum of the chromosome numbers of two parental species, owing to the doubling of the chromosomes in a hybrid of two species.
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Origin of amphidiploid

First recorded in 1925–30; amphi- + diploid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

British Dictionary definitions for amphidiploid

amphidiploid
/ (ˌæmfɪˈdɪplɔɪd) /

noun
a plant originating from hybridization between two species in which the chromosome number is the sum of the chromosome numbers of both parental species. It behaves as an independent species
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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