from
The Collaborative International Dictionary of English v.0.48
Magistral \Mag"is*tral\, a. [L. magistralis: cf. F. magistral.
See {Magistrate}.]
1. Pertaining to a master; magisterial; authoritative;
dogmatic.
[1913 Webster]
2. Commanded or prescribed by a magister, esp. by a doctor;
hence, effectual; sovereign; as, a magistral sirup. "Some
magistral opiate." --Bacon.
[1913 Webster]
3. (Pharmacy) Formulated extemporaneously, or for a special
case; -- opposed to {officinal}, and said of prescriptions
and medicines. --Dunglison.
[1913 Webster]
{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.
[1913 Webster]