What is a phrase, discourse, or proposition, susceptible of two interpretations; and hence, of uncertain meaning. It differs from equivocation, which arises from the twofold sense of a single term called?

amphibology — A phrase, discourse, or proposition, susceptible of two interpretations; and hence, of uncertain meaning. It differs from equivocation, which arises from the twofold sense of a single term. (Webster's 1913.)