(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.

Alternative form of Jacobin

Any hummingbird in the genus Florisuga.

(organic chemistry) An alkaloid found in ragwort (Jacobaea vulgaris).

(historical) Relating to or characteristic of the Jacobins; politically radical.

plural of Jacobinism

The principles of the Jacobins; violent opposition to legitimate government.

plural of Jacobine

Of or relating to the Jacobins of France; revolutionary.