Protasis
Pronunciation : Prot"a*sis
Part of Speech : n.
Etymology : [L., fr. Gr.
Definition : 1. A proposition; a maxim. Johnson.
2. (Gram.)
Defn: The introductory or subordinate member of a sentence, generally of a conditional sentence; -- opposed to apodosis. See Apodosis.
3. The first part of a drama, of a poem, or the like; the introduction; opposed to epitasis. B. Jonson.
Source : Webster's Unabridged Dictionary, 1913