allogeneityrare.|ˌæləʊdʒɪˈniːɪtɪ| [f.Gr. ἀλλογενή-ς of another race, (f. ἄλλο-ς other + γέν-ος, γένε-, kind) + -ity.] Difference of nature. 1825Coleridge Rem. (1836) II. 336 Its hetero- or rather its allo-geneity, that is, its diversity, its difference in kind.