| 单词 | nocturnal arc |
| 释义 | nocturnal arcnoun Astronomy.the portion of the diurnal circle that is below the horizon of a given point. Compare diurnal arc. Origin of nocturnal arcFirst recorded in 1695–1705 Words nearby nocturnal arcnoctuid, noctule, nocturia, nocturn, nocturnal, nocturnal arc, nocturnal emission, nocturnal enuresis, nocturnal myoclonus, nocturne, nocuous Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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