sidereal /sai'diәriәl/ GRE英语词汇 📖 中文释义 a. 星的, 恒星的, 恒星引起的, 根据星球运行测定的 📘 English Definition(英文释义) a. of or relating to the stars or constellationsa. (of divisions of time) determined by daily motion of the stars ← siderbras S 字母词表 sidereal day →