(semantics) A definition relying directly or indirectly on the term being defined.

(chemistry, physics) the differential absorption of left-handed and right-handed circularly polarized light

plural of circular arc

(informal) A term often conflated with begging the question in philosophy. / (philosophy, logic) An argument which commits the logical fallacy of assuming what it is attempting to prove.

plural of circular saw

(geometry) A portion of a circle enclosed by two radii and an arc.

plural of court circular

(UK) An official record that lists the engagements carried out by the monarch and Royal Family of the United Kingdom and the other Commonwealth realms, and appointments to their staff and to the court.

plural of circular mil

plural of circular definition