| 释义 |
‖ apsis|ˈæpsɪs|
Pl. apsides (æpˈsaɪdiːz, commonly in Eng. ˈæpsɪdiːz). Also 6–9 absis.
[L. apsis, absis (pl. aps-, absīdes), a. Gr. ἀψίς, ἁψίς a fastening, the felloe of a wheel, hence a wheel, arch, vault, f. ἅπ-τ-ειν to join, fasten. It would be well to restrict apsis to the astronomical sense, leaving apse in the architectural.]
†1. Circumference, circuit; orbit of a planet. Obs.
1601Holland Pliny I. 10 [The planets] seeme to moue more slowly when they goe their highest circuit..because the lines which are drawne from the top of the Absis, must needs grow narrow and neere together about the centre, as the spokes in cart wheeles. 1603― Plutarch's Mor. 1312 The Absis or rundle of the Sistrum. 1706Phillips, Absis..the Ring or Compass of a Wheel.
2. Astr. One of the two points in the elliptic orbit of a planetary body, at which it is respectively at its greatest and least distance from the body about which it revolves; the aphelion or perihelion of a planet, the apogee or perigee of the moon. Line of apsides: the straight line joining these two points.
1658Phillips, Absis, when the Planets moving to their highest or lowest places, are at a stay; the high Absis, being call'd the Apogæum, and the low Absis, the Perigæum. 1681Sir G. Wharton Mut. Empires Wks. 129 The Change of the Absides of the Planets. 1750Phil. Trans. XLVII. xi. 64 A given motion of the apsis, retrograde or direct. 1862H. Spencer First Princ. ii. x. §83 The revolution of the line of apsides, which in course of time moves round the heavens.
3. Arch. = apse 1.
1706Phillips, Absis or Apsis, the bowed or arched Roof of a House, Room, or Oven. 1845Ford Handbk. Spain vi. 509 One noble nave with a semicircular absis. 1852A. Jameson Leg. Madonna (1857) 6 The figure in the apsis of St. John Lateran.
b. Also, since these had their place in an apse or apsis, used for: (a) The bishop's seat or throne in ancient churches. (b) A reliquary. |