- a solid whose surface is generated by a line passing through a fixed point and a fixed plane curve not containing the point, consisting of two equal sections joined at a vertex.
- a plane surface resembling the cross section of a solid cone.
- anything shaped like a cone: sawdust piled up in a great cone; the cone of a volcano.
- ice-cream cone.
- the more or less conical multiple fruit of the pine, fir, etc., consisting of overlapping or valvate scales bearing naked ovules or seeds; a strobile.
- a similar fruit, as in cycads or club mosses.
- Anatomy. one of the cone-shaped cells in the retina of the eye, sensitive to color and intensity of light.Compare rod(def 17).
- one of a series of cone-shaped markers placed along a road, as around an area of highway construction, especially to exclude or divert motor vehicles.
- (in a taper thread screw or bevel gear) an imaginary cone or frustum of a cone concentric to the axis and defining the pitch surface or one of the extremities of the threads or teeth.
- Ceramics. pyrometric cone.
- to shape like a cone or a segment of a cone.
Origin of cone
Examples from the Web for cone
Cone Mills features in all the major chapters of the 20th century.Glenn Beck Is Now Selling Hipster Clothes. Really.
Ana Marie Cox
December 20, 2014
For his part, Logan now believes that more than 95 percent of cone bearing trees are infected.What It Takes to Kill a Grizzly Bear
November 23, 2014
In those early days, a loudspeaker was set in a plywood basket or frame with a circle cut out for the cone.Sidney Harman: An Extraordinary Life
April 13, 2011
Whatever you think of the two pieces of music on display in these videos, one thing is beyond dispute: America loves a cone bra.Bra of the Century
June 15, 2010
From cone bras at Jean-Paul Gaultier to Doc Martens and crop-tops on Lindsay Lohan and Agyness Deyn, grunge-era fashion is back.Viva La 1990s!
May 5, 2010
In literary affairs, to become the fundamental element in a cone of critics.The Devil's Dictionary
After two or three hours we reached the bottom of the cone of rocks and ashes.
Many feet down from the top it had torn a hole through the cone.
He rose early next morning, and climbed up to the top of the cone.
They went up the hill to the east, across the cone, and down into the plain below.
- a geometric solid consisting of a plane base bounded by a closed curve, often a circle or an ellipse, every point of which is joined to a fixed point, the vertex, lying outside the plane of the base. A right circular cone has a vertex perpendicularly above or below the centre of a circular base. Volume of a cone: 1/3 π r ² h, where r is the radius of the base and h is the height of the cone
- a geometric surface formed by a line rotating about the vertex and connecting the peripheries of two closed plane bases, usually circular or elliptical, above and below the vertexSee also conic section
- anything that tapers from a circular section to a point, such as a wafer shell used to contain ice cream
- the reproductive body of conifers and related plants, made up of overlapping scales, esp the mature female cone, whose scales each bear a seed
- a similar structure in horsetails, club mosses, etcTechnical name: strobilus
- a small cone-shaped bollard used as a temporary traffic marker on roads
- Also called: retinal cone any one of the cone-shaped cells in the retina of the eye, sensitive to colour and bright light
- (tr) to shape like a cone or part of a cone
Word Origin and History for cone
1560s, from Middle French cone (16c.) or directly from Latin conus "a cone, peak of a helmet," from Greek konos "cone, spinning top, pine cone," perhaps from PIE root *ko- "to sharpen" (cf. Sanskrit sanah "whetstone," Latin catus "sharp," Old English han "stone").
- A solid body having a circle for its base and sides inclined so as to meet at a point above the base.
- cone cell
- 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.
- 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. See also strobilus.
- 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. Compare rod.