| 单词 |
prosthaphæresis |
| 释义 |
‖ prosthaphæresis Astr.|prɒsθəˈfɪərɪsɪs|
Pl. -eses |-ɪsiːz|. Also 7–8 erron. prosta-; 8–9 -eresis.
[mod.L., a. Gr. προσθαϕαίρεσις previous subtraction, f. πρόσθε(ν before + ἀϕαίρεσις: see aphæresis.]
The correction necessary to find the ‘true’, i.e. actual apparent, place of a planet, etc. from the mean place; the equation of the centre. (In quot. 1677 in more general sense.)
1633H. Gellibrand in T. James Voy. R ij, The Prosthaphæresis of the ☉ orbe. 1669Sturmy Mariner's Mag. ii. 102 To Rectifie the Tables of the Sun's Declination..by Prostaphæreses. 1677R. Cary Chronol. i. i. i. vii. 19 The Months alternatively of 29, and 30 Days, except where necessity did require a Prosthaphæresis, either a Subduction, or else an Adjection of one or more Days. 1810Vince Astron. x. 96 The difference of these two angles is called the equation of the planet's center, or prosthapheresis. 1882Morton Astronomers 51 Tables of the prosthapheresis and nychthemeron are given.
Hence prosthaphæˈretical a., of, pertaining to, or involving prosthaphæresis. rare or Obs.
1635Gellibrand Var. Magn. Needle 5 Its..necessary for the Seaman who sailes by his Compasse, continually to search the variation, that so by the Prosthaphæreticall application thereof, the true point of the compasse..may be rectified. 1690Leybourn Curs. Math. 813 Called the Prosthaphaeretical Time, because it is wont sometimes to be added to, sometimes..taken from the Time of the middle Syzygy. |
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