nychthemeron
A hypersonic aircraft that improves its supersonic lift-to-drag ratio by using the shock waves generated by its own flight as a lifting surface.
A period of one day and one night, a date: in the West, this is a period of 24 consecutive hours.
simple past tense and past participle of recontest
Alternative spelling of self-absorption
旅行中、時差ぼけの影響を確かめるために睡眠と活動を一昼夜（24時間）丸ごと記録しました。
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