CONTRACTION

'Contraction' may refer to:

★ Contraction (childbirth), a contraction during childbirth

★ Contraction (grammar), a new word formed from two or more individual words, see also abbreviation and acronym

★ Braille contraction, used to decrease space and increase reading speed

★ Economic contraction, a reversal of economic growth; the opposite of economic expansion.

★ The reverse of thermal expansion

★ Contraction mapping, in mathematics, a type of function on a metric space

★ Edge contraction or vertex contraction, graph operations used in graph theory

★ Muscle contraction, one that occurs when a muscle fiber lengthens or shortens

★ Tensor contraction in tensor theory (in mathematics)

★ Synaeresis, the contraction of two vowels into a diphthong

★ Contraction, a stage in Wound healing

★ A structural rule in proof theory, see idempotency of entailment