earth
[ɜːθ]
n
the third planet from the sun, the only planet on which life is known to exist. It is not quite spherical, being flattened at the poles, and consists of three geological zones, the core, mantle, and thin outer crust. The surface, covered with large areas of water, is enveloped by an atmosphere principally of nitrogen (78 per cent), oxygen (21 per cent), and some water vapour. The age is estimated at over four thousand million years. Distance from sun: 149.6 million km; equatorial diameter: 12 756 km; mass: 5.976 × 10&+{24} kg; sidereal period of axial rotation: 23 hours 56 minutes 4 seconds; sidereal period of revolution about sun: 365.256 days
the inhabitants of this planet
the whole earth rejoiced
the dry surface of this planet as distinguished from sea or sky; land; ground
the loose soft material that makes up a large part of the surface of the ground and consists of disintegrated rock particles, mould, clay, etc; soil
worldly or temporal matters as opposed to the concerns of the spirit
the hole in which some species of burrowing animals, esp foxes, live
See rare earth See alkaline earth
a connection between an electrical circuit or device and the earth, which is at zero potential.a terminal to which this connection is made.US and Canadian equivalent ground
Also called: earth colour any of various brown pigments composed chiefly of iron oxides
of or relating to a group of three signs of the zodiac, Taurus, Virgo, and CapricornSee air See fire See water
vb
(of a hunted fox) to go to ground
to connect (a circuit, device, etc) to earth
See earth up
- 习惯用语
- cost the earth to be very expensive
- come back to earth to return to reality from a fantasy or daydream
- come down to earth 同
- on earth used as an intensifier in such phrases as what on earth, who on earth, etc
- run to earth to hunt (an animal, esp a fox) to its earth and trap it there.to find (someone) after searching
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