aneuploidy

Term: aneuploidy (an-+eu-+ploidy)

Origin: Anc Greek

αν/an (=α-/a (privative meaning “not”) or αν-/an-(=privative before a vowel)

ευ/eu(=prefix meaning "well, good, easy" )

-πλόος/ploos(noun) (=fold, combining form from verb πλάσσω /plasso(=create, make) such as in terms haploid, diploid and polyploid  

-oειδής/-oidis(=-oidy, suffix meaning “form, type”).

Coined:

Lutz (1909) was the first to report aneuploid chromosome numbers in two progenies of the interspecific cross between Oenothera lata and O. gigas. The term was coined finally in 1922 by Tackholm (1922) following his studies on genus Rosa and initially it was used for indi- viduals with one chromosome less or more than the standard complemen. Dyer et al. (1970) extended the term to cells and individuals where the

loss or gain involved even a chromosome segment

Definition:

Deviation of normal chromosome leading to loss (monosomy) or gain  of one (trisomy) or several individual chromosomes from diploid set of the correspomding species.

Sourse

A.K. Koul & M.K. Dhar Plant aneuploids: Suggestions for their classification Euphytica 104:95–106, 1998.