(nautical) A stern having a transom and joining the counter timbers at an angle, as distinguished from a round stern, which has no transom.

(obsolete) To do no harm; to make no difference.

A portable instrument in the form of a square frame for ascertaining distances and heights by measuring angles.

(telecommunications, historical) A character code represented by two sets of six lit torches, used to send messages character by character, in a two point visual fire telegraph. The character code is generated by encoding characters in a grid, where each character generates two numbers, uniquely representing each character as a pair of numbers.

plural of Latin square

A geometric magic square: one containing distinct geometric shapes rather than numbers, and where those appearing in each row, column, or diagonal can be fitted together to create an identical target shape.

The average of the squares of a set of numbers.

plural of pocket square

An area in San Francisco.

plural of square ball