plural of imperial circle

(historical) An administrative grouping within the Holy Roman Empire in its Early Modern period, primarily for the organization of common defensive structure and the collection of taxes.

Alternative form of circlish

plural of ice circle

plural of timber circle

(archaeology) A circular arrangement of wooden posts, interpreted either as a complex of freestanding poles or as the support for a large circular building.

plural of Ford circle

(geometry) Any one of a class of circles with centre at (p/q, 1/(2q²)) and radius 1/(2q²), where p/q is an irreducible fraction (i.e., p and q are coprime integers).

plural of druid's circle

A stone circle or cromlech.