amphidiploid

[am-fi-dip-loid]
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.

Origin:
1925–30; amphi- + diploid

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World English Dictionary
amphidiploid (ˌæmfɪˈdɪplɔɪd)
 
n
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 10th Edition
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Example sentences
Genome evolution of diploid and amphidiploid species.
Hybrids will be examined for amphidiploid fertility.
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