plural of circle jerker

(baseball) A pitch thrown with a grip where the pitcher makes a circle with the index finger, holding the thumb at the bottom of the ball parallel to the middle finger and holding the ball far out in the hand.

plural of dress circle

plural of parquet circle

Part of the lower floor of a theatre with seats at the rear of the parquet and beneath the galleries.

(gearing) The outline of the smallest cross section of a hyperboloid of revolution.

(mathematics) A minimum circle on a surface of revolution, cut out by a plane perpendicular to the axis.

plural of Malfatti circle

(geometry) Any of the three circles inside a given triangle such that each circle is tangent to the others and to two sides of the triangle.

simple past tense and past participle of circle jerk