(printing, historical) A thin slip of brass or steel, against which the type is arranged in a composing stick, or by the aid of which stickfuls or handfuls or type are lifted.

A scale marked with numbers for finding without calculation the number of square feet in a board.

(printing, historical) A fine, thin, short metal rule of the same height as the type, used in printing short lines in tabular matter.

Ampère's circuital law

The recommendation that a person should drink eight servings of eight ounces of water each day.

(law) The absence of rule of law in which one person, or a group of persons, rules arbitrarily.

An empirical rule for predicting the favoured alkene product(s) in elimination reactions. The alkene formed in greatest amount is the one that corresponds to removal of the hydrogen from the β-carbon having the fewest hydrogen substituents.

simple past tense and past participle of bend the rules

present participle of bend the rules

The rule that social parasites generally tend to be parasites of species or genera to which they are closely related.