单词	apsidal
释义	apsidal /ˈapsɪd(ə)l / adjective 1 Architecture In the form of or resembling an apse.The apsidal hall has a small tower over its end to give the appearance of height.... He also rounded the projecting east wing, giving it an apsidal configuration. Early in the 12th century the church was enlarged, and provided with a fashionable apsidal chancel. 2 Astronomy Relating to an apsis.An apsidal motion with a period of 80.7 years was confirmed and a third body in an eccentric orbit with a period of 85.4 years was found.... Thus, if at an apse the direction of velocity is reversed, it will trace a symmetrical orbit on the other side of the apsidal distance. Apsidal motion is one of the classical diagnostics of stellar structure. Origin Mid 19th century: from Latin apsis (see apsis) + -al.
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