or **FORMULARY**, a rule or model, or certain terms prescribed or decreed by authority, for the form and manner of an act, instrument, proceeding, or the like. Formula, in Ecclesiastical History and Theology, signifies a profession of faith.

Medicine, imports the constitution of medicines, either simple or compound, both with respect to their prescription and their consistence.

theorem or general rule or expression, for solving certain particular cases of some problem; so \( \frac{1}{2} s + \frac{1}{2} d \) is a general formula for the greater of two quantities whose sum is \( s \), and difference \( d \); and \( \frac{1}{2} s - \frac{1}{2} d \) is the formula or general value for the less quantity. Also \( \sqrt{dx - x^2} \) is the formula or general value of the ordinate to a circle whose diameter is \( d \) and absciss \( x \).