a. - Pertaining to a master; magisterial; authoritative; dogmatic.
a. - Commanded or prescribed by a magister, esp. by a doctor; hence, effectual; sovereign; as, a magistral sirup.
a. - Formulated extemporaneously, or for a special case; -- opposed to officinal, and said of prescriptions and medicines.
n. - A sovereign medicine or remedy.
n. - A magistral line.
n. - Powdered copper pyrites used in the amalgamation of ores of silver, as at the Spanish mines of Mexico and South America.