Contraction

Contraction can mean:

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• Contraction (childbirth), a contraction during childbirth;
• Contraction (linguistics), a new word formed from two or more individual words;
• Contraction (science), one that can occur to solid matter as it cools;
• Contraction mapping, in mathematics, a type of function on a metric space;
• Muscle contraction, one that occurs when a muscle fiber shortens;
• Tensor contraction in tensor theory (in mathematics);

Contraction can also refer to:

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