Contraction
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Look up contraction or contracted in Wiktionary, the free dictionary.
Contraction may refer to:
Linguistics
[edit]- Contraction (grammar), a shortened word
 - Poetic contraction, omission of letters for poetic reasons
 - Elision, omission of sounds
- Syncope (phonology), omission of sounds in a word
 
 - Synalepha, merged syllables
- Synaeresis, combined vowels
 - Crasis, merged vowels or diphthongs
 
 
Mathematics and logic
[edit]- Contraction (operator theory), in operator theory, state of a bounded operator between normed vector spaces after suitable scaling
 - Contraction hierarchies, in applied mathematics, a technique to speed up shortest-path routing
 - Contraction mapping, a type of function on a metric space
 - Edge contraction or vertex contraction, graph operations used in graph theory
 - Tensor contraction, an operation on one or more tensors that arises from the natural pairing of a finite-dimensional vector space and its dual
 - Interior product, a tensor contraction specifically of a differential form with a vector field
 - Left contraction and right contraction of multivectors in a geometric algebra, extensions of the inner product
 - One of the rules of conditional independence, in probability
 - Contraction (logic), a structural rule in proof theory
 
Medicine
[edit]- Muscle contraction, the physiological condition of a muscle which generates tension (traction) at its origin and insertion
- Uterine contraction, contraction of the uterus, such as during childbirth
 
 - Contractility, the intrinsic ability of the heart/myocardium to contract
 - Wound contraction, a stage in wound healing
 
Other uses
[edit]- Contraction (economics), a general slowdown in economic activity; the opposite of economic expansion
 - Contraction (physics), change in the volume of matter in response to a change in temperature
 - Lanthanide contraction, the decrease in size of the ionic radius of lanthanide elements with their growing atomic number
 - Contracted (film), a 2013 horror thriller film by Eric England and its sequel Contracted: Phase II (2015) which directed by Josh Forbes