(dated) A Dominican friar. / A member of a radical French political club founded (at an old Jacobin convent) in 1789 and one of the driving forces of the French Revolution.

Of, or related to the radical French political club that was a driving force of the French Revolution. / (by extension) Politically radical.

plural of Jacobin

Relating to a Jacob or James. / Relating to or characteristic of the reign of James VI and I (of Scotland and England).

A partisan of James I and of the House of Stuart.

Alternative letter-case form of Jacobian

Alternative letter-case form of Jacobian

Alternative form of Jacobin

plural of Jacobean

(mineralogy) A manganese iron oxide mineral, a magnetite spinel.