abbreviation

The result of shortening or reducing; abridgment.

(linguistics) A shortened or contracted form of a word or phrase, used to represent the whole, utilizing omission of letters, and sometimes substitution of letters, or duplication of initial letters to signify plurality, including signs such as +, =, @.

The process of abbreviating.

(music) A notation used in music score to denote a direction, as pp or mf.

(music) One or more dashes through the stem of a note, dividing it respectively into quavers, semiquavers, demisemiquavers, or hemidemisemiquavers.

Any convenient short form used as a substitution for an understood or inferred whole.

(biology) Loss during evolution of the final stages of the ancestral ontogenetic pattern.

(mathematics) Reduction to lower terms, as a fraction.