Astron.
any of the four planets closest to the sun: Mercury, Venus, the earth, or Mars. Also called terrestrial planet . Cf. outer planet .
[ 1950-55 ]
Astron.
any of the four planets closest to the sun: Mercury, Venus, the earth, or Mars. Also called terrestrial planet . Cf. outer planet .
[ 1950-55 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012