am·​phi·​dip·​loid ˌam(p)-fi-ˈdi-ˌplȯid How to pronounce amphidiploid (audio)
: an interspecific hybrid having a complete diploid chromosome set from each parent form

called also allotetraploid

amphidiploid adjective
amphidiploidy noun

Word History


amphi- + diploid entry 2

First Known Use

1930, in the meaning defined above

Time Traveler
The first known use of amphidiploid was in 1930

Dictionary Entries Near amphidiploid

Cite this Entry

“Amphidiploid.” Dictionary, Merriam-Webster, Accessed 17 Jun. 2024.

Medical Definition


am·​phi·​dip·​loid ˌam(p)-fi-ˈdip-ˌlȯid How to pronounce amphidiploid (audio)
: an individual that is a hybrid of two different species and that possesses four sets of chromosomes : allotetraploid compare amphiploid
amphidiploid adjective
amphidiploidy noun
plural amphidiploidies
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