Mag"is*tral (?), a. [L. magistralis: cf. F. magistral. See Magistrate.]
1. Pertaining to a master; magisterial; authoritative; dogmatic.
2. Commanded or prescribed by a magister, esp. by a doctor; hence,
effectual; sovereign; as, a magistral sirup. "Some magistral opiate."
Bacon.
3. (Pharmacy) Formulated extemporaneously, or for a special case; --
opposed to officinal, and said of prescriptions and medicines.
Dunglison.
Magistral line (Fort.), the guiding line, or outline, by which the form
of the work is determined. It is usually the crest line of the parapet
in fieldworks, or the top line of the escarp in permanent
fortifications.
Mag"is*tral, n. 1. (Med.) A sovereign medicine or remedy. [Obs.]
Burton.