protasis /ˈpɹɒtəsɪs/ noun2 •A clause that expresses a contingent element in a conditional sentence.In "I will be coming if this weather holds up", "if this weather holds up" is the protasis, and "I will be coming" is the apodosis. •The first part of a play, in which the setting and characters are introduced.It doubles itself in the middle of his life, reflects itself in another, repeats itself, protasis, epitasis, catastasis, catastrophe. — 1922 formsprotases
