tetraploid (4n) /tet′rəploid/ [Gk, tetraploos, fourfold, eidos, form] , 1. an individual, organism, strain, or cell that has four complete sets of chromosomes, quadruple the haploid number characteristic of the species. In humans the tetraploid number is 92; it occurs extremely rarely, in aborted or stillborn fetuses. 2. n., pertaining to such an individual, organism, strain, or cell. Also tetraploidic. Compare diploid, haploid, triploid. See also polyploid, tetraploidy.
