Noah Webster
Perihelion
PERIHE'LION
PERIHE'LIUM, noun [Gr. about, and the sun.] That part of the orbit of a planet or comet, in which it is at its least distance from the sun; opposed to aphelion.
PERIHE'LION
PERIHE'LIUM, noun [Gr. about, and the sun.] That part of the orbit of a planet or comet, in which it is at its least distance from the sun; opposed to aphelion.