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Webster 1913 Edition

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Noun.

[NL., fr. Gr. [GREEK] first beginning.]

(Med.)

The kindling of a disease into action; also, the procatarctic cause.

Quincy.

Noun.

[Gr. supra.]

The predisposing cause of a disease.

procatarxis

(medicine, dated) The kindling of a disease into action; the procatarctic cause.
(Can we find and add a quotation of Quincy to this entry?)