cone (redirected from cone cells (1))

cone  (kn) 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 gymnospermous plants such as conifers and cycads, typically consisting of a central axis around which there are scaly, overlapping, spirally arranged sporophylls that develop pollen-bearing sacs or naked ovules or seeds. b. A similar structure that produces spores on club mosses, horsetails, and spike mosses. c. Any reproductive structure resembling a cone, such as a cluster of hop or alder fruits. 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. 5. Any of various gastropod mollusks of the family Conidae of tropical and subtropical seas, having a conical, often vividly marked shell and the ability to inflict a poisonous, sometimes fatal sting. 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 cnus, from Greek knos; see k- in Indo-European roots.]

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

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cone

Noun

1. a geometric solid consisting of a circular or oval base, tapering to a point

2. a cone-shaped wafer shell used to contain ice cream

3. the scaly fruit of a conifer tree

4. Brit, Austral & NZ a plastic cone used as a temporary traffic marker on roads

5. a type of cell in the retina, sensitive to colour and bright light [Greek kōnus pine cone, geometrical cone]

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cone  (kn) 1. 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. 2. 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. 3. 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.

cone The equation for determining the volume (V) of a cone is V = 1/3 r2h.

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Cone a cone-like shape; used figuratively. See also cock.

Examples: cone of flame, 1813; of prelacy, 1641; of rays, 1831; of shade, 1667.

Thesaurus

Noun	1.	cone - 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 point cone shape, conoid 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 bracts strobile, strobilus 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 cone cell, retinal cone 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
Verb	1.	cone - make cone-shaped; "cone a tire" bevel, chamfer - cut a bevel on; shape to a bevel; "bevel the surface"

Translations

cone [kəun] n → cono (= pine cone); piña;

(for ice cream) → cucurucho

cone [kəun] n → cône m;

(for ice-cream) → cornet m;

(Bot) → pomme f de pin, cône

cone [kəun] n → Kegel m;

(on road) → Leitkegel m;

(Bot) → Zapfen m;

(ice cream cornet) → (Eis)tüte f

cone [kəun] n → cono;

(BOT) → pigna

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cone

n cone [koun]

1 a solid figure with a point and a base in the shape of a circle or oval. keël, kegel, konus; tregterقِمْعконусkuželkegleder Kegelκώνοςconokoonusمخروطkartiocôneחָרוּטशंकुčunj, stožackúpkerucutkeilacono円錐원추형(의 것)kūgiskonusskonkegelkjeglestożekconeconконусkužeľstožeckupakon, käglaกรวยkoni錐形物конусمخروطہvật hình nón锥形物

2 the fruit of the pine, fir etc fir-cones.dennebol, dennekeël, keëlكوزшишаркаšiškakogleder Zapfenκουκουνάριpiñakäbiهر نوع میوه یا دانۀ مخروط سانkäpycocotteאִצטרוּבָּלशंकुफलčešertobozbuah pinusköngullpigna松かさ(솔방울 등의) 구과(毬果)kankorėžisčiekursbuah pokok pinekegelkongleszyszkapinhaconшишкаšiškastoržšišarkakotteผลของต้นสนฝรั่งkozalak, koza球果шишкаچیڑ کے درخت کا پھلquả thông球果

3 a pointed holder for ice cream; an ice-cream cone. horing, horinkieكوز البوظَهсладоледена фунийкаkornout(ek)vaffeldie Waffeltüteχωνάκιcucuruchotorbikقیف بستنیtötteröcornetגְּביע גְלִידָהआईसक्रीम का कोनkornet(fagylalt)tölcsérkue tempat eskrimkramarhús, ísform úr brauðiconoアイスクリームコーンkaušeliskonusveida vafeļu trauciņš saldējumamkon aiskrimhoorntjekremmerhusrożek waflowyconecornetрожокkornútkornetkornetstrutกรวยไอศกรีมdondurma külâhı(盛冰淇淋的)錐形(蛋)卷筒ріжокآئس کریم کو اٹھانے والا نچلا حصہkem ốc quế蛋卷冰淇淋

4 a warning sign placed next to roadworks etc or where parking is not allowed. verkeerskeëlشكل شَكْكٌ مَخْروطي يَقول ``مَمْنوع الوُقوف''пътен конус(varovný) kuželkegleder Warnkegelπροειδοποιητικός κώνος που απαγορεύει τη στάθμευσηconokoonusمخروطهkeilacône de signalisationתַמרוּר אַזהָרָהसड़क कार्य के बगल में रखा चेतावनी संकेतznak zabrane parkiranja(terelő)bójaberbentuk kerucutvarúðarkeilacono円錐標識įspėjamasis ženklasbrīdinājuma ceļa zīmekon keselamatanverkeerskegeltrafikkjeglepachołekconepanou care indică parcarea interzisăдорожный конусkužeľstožecsaobraćajna kupicakonกรวยจราจรtrafik külâhı警告標志конусسڑک پررکھنے والا تنبیہی اشارہdấu hiệu báo công trường đang thi công警告标志

adj conical [ˈkonikəl]

cone-shaped. keëlvormig, kegelvormig, konies; tregtervormigمَخْروطي الشَّكْلконусовиденkuželový, kuželovitýkegleformet; koniskkegelförmigκωνικόςcónicokoonilineمخروط مانند؛ مخروط سانkartionmuotoinenconiqueדְּמוּי חָרוּטशंकु के आकार काčunjast, stožast, koničankúp alakúkeilulagaconico円錐形の원추형의kūgiškas, kūgio formoskonisks; konusveidaberbentuk konkegelvormigkjegleformet, kjegle-, koniskstożkowyconicконическийkónickýstožčastkupastkonformig, kägelformigที่เป็นรูปทรงกรวยkoni şeklinde圓錐形的конусоподібний; конуснийمخروطیhình nón圆锥形的