An old device consisting of one or more movable circles surrounded by other graduated or figured circles, serving to ascertain the rising and…
| 单词 | θ1507 |
| 释义 | the world > the universe > cosmology > science of observation > astronomical instruments > [noun] > other (5) volvelle1501 An old device consisting of one or more movable circles surrounded by other graduated or figured circles, serving to ascertain the rising and… semicircle1594 A semicircular instrument or one marked with a semicircle; now only = graphometer, n. octant1672 An instrument in the form of a graduated eighth of a circle, formerly used for making angular measurements esp. in astronomy and navigation. panorganon1672 a universal instrument. Antikythera mechanism1959 A mechanical astronomical device believed to have been manufactured in ancient Greece in the first or second century b.c., fragments of which were… |
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