Of or relating to the perihelion of a planet, comet, etc.
| 单词 | θ207 | 
| 释义 | the world > the universe > heavenly body > movement of heavenly bodies > 			[adjective]		 > movement in orbit > parts of orbit (5)		 perihelian1690 Of or relating to the perihelion of a planet, comet, etc. aphelian1739 Of or pertaining to the aphelion; farthest from the sun. perihelial1785 = perihelian, adj. periastral1872 Of or relating to a periastron. pericentric1888 Astronomy. Of or relating to a pericentre. rare before late 20th cent. | 
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