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| either of the two times a year when the sun is at its greatest distance from the celestial equator that takes place about June 21 and about December 22 |
| the brightness of a star in comparison with that of the sun: the luminosity of Sirius is expressed as 23 and indicates intrinsic brightness 23 times greater than the sun |
| dragon's head | |
noun | |
| American herb having sharply serrate lanceolate leaves and spikes of blue to violet flowers [syn: dragonhead] |