Look up section in Wiktionary, the free dictionary.

Section most commonly refers to: Wikipedia does not have an article with this exact name. ... Wiktionary is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ...

• A part of something (especially a document)
• A cross section (disambiguation) of some kind

Section may also refer to: As a noun, a part is a section of a greater whole. ... A document contains information. ... Cross section can refer to: Cross section (geometry), the intersection of a 3-dimensional body with a plane Cross section (physics), the likelihood of an interaction event between two particles Radar cross section Neutron cross-section Absorption cross section Plan view, in orthographic projections, a view taken part way through...

The Arts

• A section (music) of musical form
• A section of a musical ensemble, usually of like instruments, such as the string section in an orchestra
• Section 31 in the fictional Star Trek universe

In music a section is a complete, but not independent musical idea (Bye 1993, p. ... A musical ensemble is a group of two or more musicians who gather to perform music. ... Section 31 is the unofficial designation of a rogue and officially nonexistent intelligence and defense organization resembling secret police or a black-ops organization in the Star Trek fictional universe. ...

Biology and Medicine

• A cross section (geometry)
• A section (botany), a taxanomic rank below genus
• A Caesarean section, a method of child birth
• Sectioning, involuntary detention for mental treatment in the United Kingdom

In geometry, a cross section is the intersection of a body in 3-dimensional space with a plane, or of a body in 2-dimensional space with a line, etc. ... In botanical nomenclature, a taxon is usually assigned to a rank in a hierarchy. ... A caesarean section (cesarean section AE), or c-section, is a form of childbirth in which a surgical incision is made through a mothers abdomen (laparotomy) and uterus (hysterotomy) to deliver one or more babies. ... The British Mental Health Act 1983 has a number of sections that provide powers for involuntary detention, hospitalization or other medical treatment for people affected by mental illness. ...

Mathematics

• A cross section (geometry)
• A conic section, a type of geometric curve
• A section of a fiber bundle
• A section of a sheaf
• In homological algebra, a map s: N -> M, given a (surjective) homomorphism h: M -> N, such that sh is the identity on N; see splitting lemma

In geometry, a cross section is the intersection of a body in 3-dimensional space with a plane, or of a body in 2-dimensional space with a line, etc. ... Types of conic sections Table of conics, Cyclopaedia, 1728 In mathematics, a conic section (or just conic) is a curve formed by intersecting a cone (more precisely, a right circular conical surface) with a plane. ... In mathematics, in particular in topology, a fiber bundle (or fibre bundle) is a space which locally looks like a product of two spaces but may possess a different global structure. ... In mathematics, a sheaf F on a topological space X is something that assigns a structure F(U) (such as a set, group, or ring) to each open set U of X. The structures F(U) are compatible with the operations of restricting the open set to smaller subsets and... In mathematics, and more specifically in homological algebra, the splitting lemma states that the following statements regarding the below short exact sequence in any abelian category (with similar results if the objects are non-abelian groups) are equivalent: there exists a map t: B → A such that tq is...

Other uses

• A Section (military unit)
• A Section (Scouting), an age grouping of The Scout Association providing age-suitable activities for children
• A section (U.S. land surveying), a one square mile subdivision of a survey township
• The section sign (§), in typography
• An archaeological section, a cross-section of a dig
• A Stratigraphic section, a sequence of layers of rocks in the order they were deposited

The examples and perspective in this article or section may not represent a worldwide view. ... It has been suggested that this article or section be merged into Scouting. ... Sectioning a township. ... The section sign (§; Unicode U+00A7, HTML entity §) is a typographical character used mainly to refer to a particular section of a document, such as a legal code. ... Half-section through a Saxon pit In archaeology a section is a view of an excavated archaeological trench or feature showing the contents of that feature in two dimensions (vertical and horizontal) and thereby illustrating its profile and stratigraphy. ...

See also

• Part
• Segment (disambiguation)
• Division (disambiguation)

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