Definition of diathesis

< diathermy

diatom >

di·ath·e·sis    (d-th-ss) KEY 

NOUN:
pl. di·ath·e·ses  (-sz) KEY 

1. A hereditary predisposition of the body to a disease, a group of diseases, an allergy, or another disorder.
2. Grammar See voice.

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ETYMOLOGY:
Greek, disposition, condition, from diatithenai, diathe-, to dispose : dia-, dia- + tithenai, to place, set; see dh- in Indo-European roots

OTHER FORMS:
dia·thetic  (d-thtk) KEY (Adjective)