Diathesis \Di*ath"e*sis\, n. [NL., fr. Gr. ?, fr. ? to place separately, arrange; dia` through, asunder + ? to place, put.]

(Med.) Bodily condition or constitution, esp. a morbid habit which predisposes to a particular disease, or class of diseases.

Source: Webster's Revised Unabridged Dictionary (1913)