tetraploid

[te-truh-ploid]
adjective Biology.
1.
having a chromosome number that is four times the basic or haploid number.
noun
2.
a tetraploid cell or organism.

Origin:
1925–30; tetra- + -ploid

tetraploidy, noun
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World English Dictionary
tetraploid (ˈtɛtrəˌplɔɪd)
 
adj
1.  having four times the haploid number of chromosomes in the nucleus
 
n
2.  a tetraploid organism, nucleus, or cell

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

tetraploid tet·ra·ploid (tět'rə-ploid')
adj.
Having four times the haploid number of chromosomes in the cell nucleus. n.
A tetraploid individual.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
So, if a mouse is born from a stem cell injected into a tetraploid blastocyst, that stem cell must have been totipotent.
Consumers generally prefer the vigor and improved horticultural traits of tetraploid daylily clones.
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