ploidyn.
/ˈplɔɪdi/, U.S. /ˈplɔɪdi/ Biology.
The number of homologous sets of chromosomes in a cell or in each cell of an organism; degree of polyploidy.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > ploidy
triploidy1916
tetraploidy1918
haploidy1921
hexaploidy1922
polyploidy1922
octoploidy1924
aneuploidy1925
heteroploidy1926
allopolyploidy1927
autopolyploidy1928
hyperdiploidy1929
polysomy1929
hyperploidy1930
hypoploidy1930
mixoploidy1931
syndiploidy1932
allotetraploidy1933
autotetraploidy1935
monoploidy1937
polysomaty1937
ploidy1940
pseudodiploidy1965
polysomatism1967
1940 J. S. Huxley New Systematics 13 Genome-mutation involving the ploidy may be of great importance.
1961 Lancet 5 Aug. 318/1 All metaphases have been analysed. When an exact account was impossible the ploidy level has been estimated.
1970 Watsonia 8 140 As most of our counts are approximate the ploidy level rather than the chromosome number is given.
2001 School Sci. Rev. Dec. 98/2 This approach might also help to clarify the ploidy at different stages of nuclear division.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1940