diploid /ˈdɪploiːʔ/adjective 3noun 2forms 1 adjective3 •Of a cell, having a pair of each type of chromosome, one of the pair being derived from the ovum and the other from the spermatozoon. Most somatic cells of higher organisms are diploid. •Of an organism, having diploid cells. •Of a certain symmetry class with 24 congruent irregular quadrilateral faces. noun2 •A diploid cell. •A diploid organism.The variation of caryopsis characters in species of Aegilops and wheat diploids is similar to that of wheat tetraploids . — 1995 formsdiploids