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."
3.
(Pharmacy) Formulated extemporaneously, or for a special case; opposed to officinal, and said of prescriptions and medicines.
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.
... the manner of the tradition and delivery of knowledge, which is for the most part magistral and peremptory, and not ingenuous and faithful; in a sort as may be soonest believed, and not easiest examined. It is true, that in compendious treatises for practice that form is not to be disallowed; but in the true handling of knowledge men ought not to fall ... — The Advancement of Learning • Francis Bacon
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