Cone meaning

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The diaphragm of a speaker, usually cone-shaped.
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The definition of a cone is anything with a circular surface on one end and one point at the other end where all sides or lines meet, or the reproductive, seed-bearing growth of a pine tree.

An example of a cone is a funnel.

An example of a cone is the waffle pastry in which ice cream is served.

An example of a cone is the brown scaly growth which is attached to wreathes.

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To shape like a cone or a conical segment.
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(physiology) One of the photoreceptors in the retina of the eye that is responsible for daylight and color vision. These photoreceptors are most densely concentrated in the fovea centralis, creating the area of greatest visual acuity.
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Any of various gastropod mollusks of the family Conidae of tropical and subtropical seas that have a conical, often vividly marked shell and that inject their prey with poisonous toxins, which can be fatal to humans.
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To shape (something) like a cone or a segment of one.
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Any object or mass shaped like a cone.
  • A crisp shell of pastry for holding a scoop of ice cream.
  • The peak of a volcano.
  • Any of various machine parts.
  • Any of the brightly colored plastic objects used as a barrier to divert traffic from roadwork, from a chuckhole, etc.
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(physiology) One of the photoreceptors in the retina of the eye that is responsible for daylight and color vision. These photoreceptors are most densely concentrated in the fovea centralis, creating the area of greatest visual acuity.
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A three-dimensional surface or solid object in which the base is a circle and upper surface narrows to form a point. The surface of a cone is formed mathematically by moving a line that passes through a fixed point (the vertex) along a circle.
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A rounded or elongated reproductive structure that consists of sporophylls or scales arranged spirally or in an overlapping fashion along a central stem, as in conifers and cycads. For example, the familiar woody pinecone is actually the female cone, made up of ovule-bearing scales. The smaller male cones of the pine consist of thin overlapping microsporophylls. These produce pollen that is carried by the wind to fertilize ovules in the female cones. When the seeds in the female cones mature, the cones of many pine species expand to release them. In some pine species, cones release seeds only in response to the presence of fire.
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One of the cone-shaped cells in the retina of the eye of many vertebrate animals. Cones are extremely sensitive to light and can distinguish among different wavelengths. Cones are responsible for vision during daylight and for the ability to see colors.
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(geometry) A surface of revolution formed by rotating a segment of a line around another line that intersects the first line.
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(geometry) A solid of revolution formed by rotating a triangle around one of its altitudes.
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(topology) A space formed by taking the direct product of a given space with a closed interval and identifying all of one end to a point.
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Anything shaped like a cone.
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The fruit of a conifer.
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An ice cream cone.
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A unit of volume, applied solely to marijuana and only while it is in a smokable state; roughly 1.5 cubic centimetres, depending on use.
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Any of the small cone-shaped structures in the retina.
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(slang) The bowl piece on a bong.
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(slang) The process of smoking cannabis in a bong.
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(slang) A cone-shaped cannabis joint.
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(slang) A passenger on a cruise ship (so-called by employees after traffic cones, from the need to navigate around them)
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(category theory) Given a diagram F : JC, a cone consists of an object N of C, together with a family of morphisms ψX : NF(X) indexed by all of the objects of J, such that for every morphism f : XY in J. Then N is the vertex of the cone, whose sides are all the ψX indexed by Ob(J) and whose base is F. The cone is said to be "from N to F" and can be denoted as (N, ψ).

«Let J be an index category which has an initial object I. Let F be a diagram of type J in C. Then category C contains a cone from F(I) to F.»

«If category C has a cone from N to F and a morphism from M to N, then category C also has a cone from M to F.»

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A shell of the genus Conus, having a conical form.
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A set of formal languages with certain desirable closure properties, in particular those of the regular languages, the context-free languages and the recursively enumerable languages.
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(pottery) To fashion into the shape of a cone.
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Origin of cone

  • French cône Middle English cone angle of a quadrant both from Latin cōnus from Greek kōnos kō- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle French cone, from Latin conus (“cone, wedge, peak”), from Ancient Greek κώνος (konos, “cone, spinning top, pine cone”)

    From Wiktionary