apsis
n.
"perigree of the moon, perihelion of a planet" (plural apsides), 1650s, from Latin apsis "arch, vault" (see apse).
词汇 | apsis |
词根词缀 | Online Etymology Dictionary apsis n. "perigree of the moon, perihelion of a planet" (plural apsides), 1650s, from Latin apsis "arch, vault" (see apse). |
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