cone

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cone
top: right circular cone
bottom: cones and rods of a human eye

cone

 (kōn)
n.
1. Mathematics
a. The surface generated by a straight line, the generator, passing through a fixed point, the vertex, and moving along a fixed curve, the directrix.
b. A right circular cone.
2.
a. The figure formed by a cone, bound or regarded as bound by its vertex and a plane section taken anywhere above or below the vertex.
b. Something having the shape of this figure: "the cone of illuminated drops spilling beneath a street lamp" (Anne Tyler).
3. Botany
a. A unisexual reproductive structure of most gymnospermous plants, such as conifers and cycads, typically consisting of a central axis around which there are scaly, overlapping, spirally arranged sporophylls that bear either pollen-containing structures or ovules.
b. A similar, spore-producing structure of club mosses, horsetails, and spikemosses.
c. A reproductive structure resembling a cone, such as the female inflorescence of a hop plant or the woody female catkin of an alder.
4. 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. Also called cone cell.
5. 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. Also called cone shell.
tr.v. coned, con·ing, cones
To shape (something) like a cone or a segment of one.

[French cône and Middle English cone, angle of a quadrant, both from Latin cōnus, from Greek kōnos; see kō- in Indo-European roots.]

cone

(kəʊn)
n
1. (Mathematics)
a. 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: πr2h, where r is the radius of the base and h is the height of the cone
b. 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 vertex. See also conic section
2. anything that tapers from a circular section to a point, such as a wafer shell used to contain ice cream
3. (Botany)
a. the reproductive body of conifers and related plants, made up of overlapping scales, esp the mature female cone, whose scales each bear a seed
b. a similar structure in horsetails, club mosses, etc. Technical name: strobilus
4. (Civil Engineering) a small cone-shaped bollard used as a temporary traffic marker on roads
5. (Anatomy) Also called: retinal cone any one of the cone-shaped cells in the retina of the eye, sensitive to colour and bright light
vb
(tr) to shape like a cone or part of a cone
[C16: from Latin cōnus, from Greek kōnus pine cone, geometrical cone]

cone

(koʊn)

n., v. coned, con•ing. n.
1.
a. 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.
b. a plane surface resembling the cross section of a solid cone.
2. anything shaped like a cone: the cone of a volcano.
4.
a. the reproductive structure of certain nonflowering trees and shrubs, as the pine, consisting of hard or papery scales bearing naked seeds and arranged in an overlapping whorl around an axis. Compare conifer.
b. a similar structure, as in cycads or club mosses.
5. one of the cone-shaped cells in the retina of the eye, sensitive to bright light and color. Compare rod (def. 11).
v.t.
6. to shape like a cone or a segment of a cone.
[1480–90; < Latin cōnus < Greek kônos pine cone, cone-shaped figure; akin to hone1]
click for a larger image
cone
cone
top: The volume (V) of a cone can be calculated using the following equation: V = 1/3 πr2h.
bottom: detail of the retina showing cones and rods

cone

(kōn)
1. A three-dimensional surface or solid object in which the base is a circle and the sides narrow 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.
2. A rounded or elongated cluster of woody scales enclosing the reproductive structures of conifers such as pines, spruces, and firs. Cones are either male, producing pollen, or female, bearing seeds. Male cones are much smaller than female cones. When the seeds become mature, the female cones expand to release them.
3. One of the cone-shaped cells in the retina of the eye of many vertebrate animals. Cones are responsible for daylight vision and, in some animals, for the ability to see colors. Compare rod.

Cone

 a cone-like shape; used figuratively. See also cock.
Examples: cone of flame, 1813; of prelacy, 1641; of rays, 1831; of shade, 1667.

cone


Past participle: coned
Gerund: coning

Imperative
cone
cone
Present
I cone
you cone
he/she/it cones
we cone
you cone
they cone
Preterite
I coned
you coned
he/she/it coned
we coned
you coned
they coned
Present Continuous
I am coning
you are coning
he/she/it is coning
we are coning
you are coning
they are coning
Present Perfect
I have coned
you have coned
he/she/it has coned
we have coned
you have coned
they have coned
Past Continuous
I was coning
you were coning
he/she/it was coning
we were coning
you were coning
they were coning
Past Perfect
I had coned
you had coned
he/she/it had coned
we had coned
you had coned
they had coned
Future
I will cone
you will cone
he/she/it will cone
we will cone
you will cone
they will cone
Future Perfect
I will have coned
you will have coned
he/she/it will have coned
we will have coned
you will have coned
they will have coned
Future Continuous
I will be coning
you will be coning
he/she/it will be coning
we will be coning
you will be coning
they will be coning
Present Perfect Continuous
I have been coning
you have been coning
he/she/it has been coning
we have been coning
you have been coning
they have been coning
Future Perfect Continuous
I will have been coning
you will have been coning
he/she/it will have been coning
we will have been coning
you will have been coning
they will have been coning
Past Perfect Continuous
I had been coning
you had been coning
he/she/it had been coning
we had been coning
you had been coning
they had been coning
Conditional
I would cone
you would cone
he/she/it would cone
we would cone
you would cone
they would cone
Past Conditional
I would have coned
you would have coned
he/she/it would have coned
we would have coned
you would have coned
they would have coned
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cone - any cone-shaped artifactcone - any cone-shaped artifact    
artefact, artifact - a man-made object taken as a whole
2.cone - a shape whose base is a circle and whose sides taper up to a pointcone - a shape whose base is a circle and whose sides taper up to a point
round shape - a shape that is curved and without sharp angles
funnel, funnel shape - a conical shape with a wider and a narrower opening at the two ends
tip, peak, point - a V shape; "the cannibal's teeth were filed to sharp points"
3.cone - cone-shaped mass of ovule- or spore-bearing scales or bractscone - cone-shaped mass of ovule- or spore-bearing scales or bracts
reproductive structure - the parts of a plant involved in its reproduction
fir cone - the seed-producing cone of a fir tree
galbulus - the seed-producing cone of a cypress tree
pinecone - the seed-producing cone of a pine tree
conifer, coniferous tree - any gymnospermous tree or shrub bearing cones
horsetail - perennial rushlike flowerless herbs with jointed hollow stems and narrow toothlike leaves that spread by creeping rhizomes; tend to become weedy; common in northern hemisphere; some in Africa and South America
club moss, club-moss, lycopod - primitive evergreen moss-like plant with spores in club-shaped strobiles
4.cone - a visual receptor cell in the retina that is sensitive to bright light and to color
retina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve
visual cell - one of the cells of the retina that is sensitive to light
iodopsin - a violet photopigment in the retinal cones of the eyes of most vertebrates; plays a role in daylight vision
Verb1.cone - make cone-shaped; "cone a tire"
bevel, chamfer - cut a bevel on; shape to a bevel; "bevel the surface"
Translations
قِمْعكوزكوز البوظَهمَخْرُوط
kuželšiškačípekkornout
keglekoglevaffel
kartio
stožac
tobozkúpterelõbója
keilaköngullkramarhús, ísform úr brauîivarúîarkeila
円錐形のもの
원뿔
įspėjamasis ženklaskankorėžiskaušeliskūgio formoskūgis
brīdinājuma ceļa zīmečiekurskonusskonusveida vafeļu trauciņš saldējumam
kužeľšiška
stožeckornetstorž
strutkon
กรวย
konikozakozalaktrafik külâhıdondurma külâhı
hình nón

cone

[kəʊn] N
1. (Math) → cono m
traffic conecono m señalizador
2. (Bot) → piña f
3. (also ice cream cone) → cucurucho m
cone off VT + ADV [+ road] → cerrar or cortar con conos

cone

[ˈkəʊn] n
(= shape) → cône m
(for ice-cream)cornet m
an ice-cream cone → un cornet de glace
(also fir cone) → pomme f de pin, cône m
(also traffic cone) → cône m de signalisation

cone

n
Kegel m; (Geol: of volcano) → (Berg)kegel m; (= storm cone)Windsack m; (= traffic cone)Pylon m (form), → Leitkegel m; (Space: = nose cone) → Nase f; a cone of lightein Lichtkegel m
(Bot) → Zapfen m
(= ice-cream cone)(Eis)tüte f

cone

[kəʊn] n (gen, of ice cream) → cono (Aut) → birillo (Bot) → pigna
cone off vt + advchiudere al traffico (un'area o un tratto stradale, delimitandolo con birilli)

cone

(koun) noun
1. a solid figure with a point and a base in the shape of a circle or oval.
2. the fruit of the pine, fir etc. fir-cones.
3. a pointed holder for ice cream; an ice-cream cone.
4. a warning sign placed next to roadworks etc or where parking is not allowed.
conical (ˈkonikl) adjective
cone-shaped.

cone

مَخْرُوط kužel kegle Kegel κώνος cono kartio cône stožac cono 円錐形のもの 원뿔 kegel kjegle stożek cone конус strut กรวย koni hình nón

cone

n. cono, uno de los órganos sensoriales que, con los bastoncillos de la retina, facilitan la visión del color;
___ cells___ -s de la retina.

cone

n (anat, gyn, ophthalmology, etc.) cono