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单词 cone
释义

cone

/kəʊn /
noun
1A solid or hollow object which tapers from a circular or roughly circular base to a point: stalls selling paper cones full of fresh berries a cone of acrylic yarn...
  • Its present shape is a truncated cone with a base area of 2.1ha and a height of 40m.
  • Spiny brown growths resembling hollow cones that form at branch tips on Colorado spruce are caused by an insect called Cooley spruce gall aphid.
  • An old wooden soccer goal sits in pieces at the base of the cone, placed there by soldiers who once played on what was undoubtedly the world's most dangerous soccer field.
1.1 Mathematics A surface or solid figure generated by the straight lines which pass from a circle or other closed curve to a single point (the vertex) not in the same plane as the curve.In the first 57 propositions in On the Section of a Cone Serenus examined triangular sections of right and scalene cones made by planes passing through the vertex....
  • If the planes pass through the vertex of the cone, the conics are said to be degenerate, otherwise they are not.
  • To be precise, it has to pass through the cone surface
1.2A conical mountain, especially one of volcanic origin: the smooth cone of Vesuvius...
  • Various architectures connecting extrusive mud volcanic cones to their underlying source layer have been described, ranging from bulbous diapirs to steep diatremes and narrow vertical pipes.
  • Monogenetic volcanoes are small and occur as scoria cones, tuff cones and rings, and maars; they form from single, typically brief eruptions.
  • That error is encouraged by the mountain's cone shape and real volcanoes nearby - as at Sibley Preserve.
1.3 (also traffic cone) A plastic cone-shaped object that is used to separate off or close sections of a road.There are also several planks of wood, a traffic cone, a section of mesh metal fence and a shopping trolley....
  • Video footage showed him throwing up to a dozen missiles and a traffic cone at police in the White Abbey Road area during his 35-minute involvement.
  • Moving on toward the production control area, Duncan stops to indicate a red traffic cone sitting inside a square taped on the floor.
1.4A coned-shaped wafer container in which ice cream is served.Ice cream cones will be served; the butterfly wing will be open....
  • I no longer eat chocolate ice cream cones because of that searing memory.
  • Unfortunately, celery sticks aren't as tempting as overgrown cinnamon buns and chocolate-dipped ice cream cones.
1.5 (also pyrometric cone) A ceramic pyramid that melts at a known temperature and is used to indicate the temperature of a kiln.The imperfections are then cleaned off with tools and the casting is put in the kiln at 1225 cone 6 and becomes vitrified porcelain....
  • After the tiles were coated, they were loaded into the kilns and fired to cone 5.
  • Planters are covered with a clear glaze and fired to cone 05 in an electric kiln.
1.6 short for cone shell.
2The dry fruit of a conifer, typically tapering to a rounded end and formed of a tight array of overlapping scales on a central axis which separate to release the seeds: a cedar cone...
  • Conifer cones, cone scales, cone seeds, and tiny scaly conifer stems are found at a number of short-shoot sites.
  • Pinaceae are Monoecious with small pollen cones and larger seed cones with spirally arranged scales.
  • But that's good news for the tree, since fire opens its serotinous cones to release the seeds, starting the process over again.
2.1A flower resembling a pine cone, especially that of the hop plant.Magnus has large, warm purple flowers with an orange cone on strong stems about 90 cm tall and has a very long flowering period from July to October....
  • I covered the plants with rose cones from the garden center.
  • Both have daisy-like flowers with a black cone at the centre, and both need well-drained, humus-rich soil and also benefit from feeding in midsummer.
3 Anatomy One of two types of light-sensitive cell in the retina of the eye, responding mainly to bright light and responsible for sharpness of vision and colour perception. Compare with rod (sense 5).Rods are responsible for vision in low light and cones are responsible for color vision....
  • The cornea and lens of the eye ensure that the light rays are focused on the rods and cones of the retina.
  • This test evaluates the cones of the retina and the visual cortex.
verb [with object] (cone something off) British
Separate off or mark a road with traffic cones: part of the road has been coned off...
  • Sections of the roundabout's roads will be coned off but it will remain open to traffic.
  • Here, the nearside lane of the westbound dual carriageway of the A64 was coned off, causing horrendous traffic jams.
  • Council workers moved into Gillygate and coned the street off preparing to start work.

Origin

Late Middle English (denoting an apex or vertex): from French cône, via Latin from Greek kōnos.

Rhymes

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更新时间:2024/9/20 7:50:25