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1. Oxford Dictionary

   polar

   • IPA[ˈpəʊlə]

   英式

   • adj.
     relating to the North or South Pole；(of an animal or plant) living in the north or south polar region
   • n.
     the straight line joining the two points at which tangents from a fixed point touch a conic section.；a variable binary star which emits strongly polarized light, one component being a strongly magnetic white dwarf.

   • noun: polar, plural noun: polars

2. • 釋義
   • 相關詞

   adj.

   形容詞

   • 1. relating to the North or South Pole the polar regions 同義詞 Arctic, Antarctic, cold, frozen, freezing, ... 更多frigid, chill, chilling, icy, icy-cold, glacial, gelid, Siberian, informalBaltic, rareboreal, hyperborean, circumpolar, brumal, borean, hyperboreal
   • ▪ (of an animal or plant) living in the north or south polar region most polar birds breed seasonally
   • ▪ relating to the poles of a celestial body the polar radius of Jupiter is 66,550 km
   • ▪ relating to a celestial pole.
   • ▪ relating to the poles of a sphere.
   • ▪ relating to the poles of a cell, organ, or part.
   • 2. having electrical or magnetic polarity.
   • ▪ (of a liquid, especially a solvent) consisting of molecules with a dipole moment.
   • ▪ (of a solid) ionic.
   • 3. directly opposite in character or tendency depression and its polar opposite, mania 同義詞 opposite, opposed, opposing, oppositional, diametrically opposed, ... 更多extreme, contrary, contradictory, antithetical, antagonistic, conflicting, counterbalancing, rareantitypical, antonymous, antipodal, contrarious, dichotomous, oppositive

   n.

   名詞

   • 1. the straight line joining the two points at which tangents from a fixed point touch a conic section.
   • 2. a variable binary star which emits strongly polarized light, one component being a strongly magnetic white dwarf.

   polar coordinates

   • plural
     a pair of coordinates locating the position of a point in a plane, the first being the length ...

   Oxford Dictionary

   polar coordinates

   • plural
     a pair of coordinates locating the position of a point in a plane, the first being the length ...

   Oxford American Dictionary

   polar distance

   • n.
     the angular distance of a point on a sphere from the nearest pole.

   Oxford Dictionary

   polar distance

   • n.
     the angular distance of a point on a sphere from the nearest pole.

   Oxford American Dictionary

   polar bear

   • n.
     a large white arctic bear which lives mainly on the pack ice. It is a powerful swimmer and ...

   Oxford Dictionary

   polar orbit

   • n.
     a satellite orbit that passes over polar regions, especially one whose plane contains the polar ... an amateur radio satellite in a polar orbit the agency maintains four satellites, two in polar orbit

   Oxford American Dictionary

   polar star

   • n.
     a star at or close to a celestial pole, especially the Pole Star: Alpha Draconis used to be the north polar star

   Oxford Dictionary

   polar curve

   • n.
     a curve drawn on polar coordinates around a fixed point, as in a polar diagram.

   Oxford Dictionary

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3. • 更多解釋

   polar

   • IPA[ˈpōlər]

   美式

   • adj.
     relating to the North or South Pole: the polar regions
   • n.
     the straight line joining the two points at which tangents from a fixed point touch a conic section.

   Oxford American Dictionary