1
- happening at or near the time of an equinox（近）春分（或秋分）时发生的。
1.1
- of or relating to equal day and night（与）昼夜平分（有关）的, 二分时刻的。
1.2
- at or near the equator（近）赤道的。
词源
late Middle English （in the sense 'relating to equal periods of day and night'）： via Old French from Latin aequinoctialis, from aequinoctium （see EQUINOX）.