See polyploidy. [G. tetraploos, fourfold, + eidos, form]
* * *
tet·ra·ploid 'te-trə-.plȯid adj having or being a chromosome number four times the monoploid number <a \tetraploid cell>
tetraploid n a tetraploid individual
* * *
tet·ra·ploid (tetґrə-ploid″) 1. pertaining to or characterized by tetraploidy. 2. an individual or cell having four sets of chromosomes.Medical dictionary. 2011.