dīˈathəsə̇s noun
( plural diathe·ses -əˌsēz)
Etymology: New Latin, from Greek, literally, arrangement, disposition, from diatithenai to arrange, dispose, from dia- + tithenai to set, put, place — more at do
1. : a bodily tendency or constitutional predisposition toward some abnormality or disease
hemorrhagic diathesis
tubercular diathesis
2. : an innate disposition toward or aptitude for some particular mental development
3. of a verb : voice 7