plural of Parker square

(mathematics) A method of fitting a straight line through a series of points such that the sum of the squares of the residuals is minimized

A puzzle similar to a Rubik's Cube that can change shape due to the way it is cut.

plural of square rig

(heraldry) Of a charge: perforated with a square opening so as to show the field.

(prison slang) A prisoner who generally obeys the rules and avoids trouble.

plural of square john

A roof whose principal rafters meet at a right angle.

plural of square roof

(dated, derogatory or humorous) stuffy; precise