Cone (from the Greek κώνος, Latin conu) is a basic geometrical shape. It may also refer to:

• Cone (software), a text-based e-mail client and news client for Unix-like operating systems.
• Volcanic cone, a mountain formed by material ejected from a volcanic vent
• Conifer cone, a seed-bearing organ on conifer plants
• Cone cell, in anatomy, a type of light-sensitive cell found along with rods in the retina of the eye
• Pyrometric cone, in ceramic manufacture, a contolled mixture of minerals used to gauge the extent of firing
• Ice cream cone, an edible container in which ice cream is served, shaped like an inverted cone open at its top
• Cone is a colloquial Australian term for cannabis, most commonly a bong load or 'bowl' of cannabis.
• Traffic cone, a brightly colored cone-shaped plastic object commonly used as a temporary traffic barrier or warning sign
• Cone, the name given to an optical fibre that tapers almost to a point
• Cone, a part of a loudspeaker that moves the air, creating sound waves
• Cone snails, carnivorous molluscs of the family Conidae, colloquially called "cones".
• Elizabethan collars, cone-shaped collars worn by pets
• A person acting stupid. The reference is in relation to a dunce cap or being as smart as a traffic cone.

In mathematics:

The surface generated by a straight line, the generator, passing through a fixed point, the vertex, and moving along a fixed curve, the directrix. A right circular cone.

• Cone (geometry), the basic shape
• The Cone (topology) of an arbitrary set X means the union of all line segments connecting a fixed point to points of X. For example, this coning operation will turn a triangle into a tetrahedron. The cone over an n-simplex is an (n+1)-simplex.
• The mapping cone of a map of chain complexes. (See mapping cone (homological algebra)).
• Projective cone, a similar (but more general) concept in projective geometry
• Conical surface, generated by a moving line with one fixed point
• Conic section, any curve obtained by cutting a conical surface by an arbitrary plane
• Mapping cone of a continuous map of topological spaces
• Mapping cone (homological algebra) of a continuous map of chain complexes
• Cone (linear algebra), in linear algebra, a subset of vector space closed under positive scaling
  • Convex cone, a cone that is closed under convex combinations
• Cone graph, in graph theory, a graph with a universal vertex
• Central projection, also called "conical projection", in geometry; see also perspective projection
• In cartography, however, a conic (or conical) projection maps the spherical surface of the Earth to a conical surface, that is then unrolled onto a plane; see map projection
• Cone (category theory), a family of morphisms resembling a geometric cone.
• A cone is an abstract family of languages that contains those formal languages having a regular grammar.

People

• Cone, the nickname of Jason McCaslin, bassist for the Canadian band Sum 41
• Fairfax M. Cone, an American advertising executive

See also

• KONE

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