Definitions for "Protasis"
The introductory or subordinate member of a sentence, generally of a conditional sentence; -- opposed to apodosis. See Apodosis.
The first part of a drama, of a poem, or the like; the introduction; opposed to epitasis.
The part of a conditional sentence which expresses the condition: si tengo dinero compraré el libro.
Keywords:  proposition, maxim
A proposition; a maxim.