(idiomatic) Back to the start, as after a dead end or failure.

The form of writing used in ancient Rome for inscriptions.

(mathematics, of a set of numbers or values) The square root of the arithmetic mean of the squares.

(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

(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

(roofing) Shingle with tabs that are all the same size and exposure.

plural of square tab shingle

a light snack consisting of Rice Krispies packed tightly together into a cube or cuboid by caramel or other sticky edible substances.