(physics) any physical law, such as that of gravitation, in which a quantity varies inversely with distance from a source as the square of that distance

(cricket) A fielding position on the leg side, square of the batsman's wicket; a fielder in that position.

(cricket) The umpire who stands at or near square leg to rule on decisions at the batsman's end of the wicket. In some circumstances, the umpire may stand at the equivalent position on the opposite side of the batsman (between gully and point), but is still referred to as the square leg umpire in these circumstances.

The form of writing used in ancient Rome for inscriptions.

(algebra) The identity x²-y²=(x+y)(x-y), that holds for all real numbers.

(statistics) A probability distribution widely used in inferential statistics.

(mathematics) any statistical hypothesis test in which the test statistic has a chi-square distribution if the null hypothesis is true

(statistics) the sum of the squared residuals between some model and a dataset; a measure of how well the model fits with the data

To position one's shoulders back and in a straight line, forming a sort of square's edge. / (figuratively) To prepare to deal with a hard task, to ready oneself for difficulty.

plural of chi-square distribution