The observatory recorded the star at its zenith, the one moment each night when atmospheric distortion is least.
天文台在这颗恒星到达天顶时进行记录，那是每晚大气畸变最小的一刻。
Which choice best defines “zenith”?
B — The highest point; peak.. “zenith” means The highest point; peak..
Which word means “The highest point; peak.”?
D — zenith. “zenith” means The highest point; peak..
zenith — The highest point; peak.. In Chinese: 顶点；巅峰.
zenith is pronounced //ˈzɛnɪθ//.
The observatory recorded the star at its zenith, the one moment each night when atmospheric distortion is least. (天文台在这颗恒星到达天顶时进行记录，那是每晚大气畸变最小的一刻。)
peak, apex, culmination — all close in meaning to zenith (The highest point; peak.).
nadir, trough — each the opposite of zenith (The highest point; peak.).
Yes. zenith is on the SAT Prep Difficult list — the higher-register words that decide the hard questions. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
阿拉伯语(头顶) → 最高处。