| 词源 |
analemma n.1650s, "projection of the celestial sphere onto the plane of the meridian," later the name of an astronomical instrument to do this (1660s), from Latin analemma name of a type of sundial known in antiquity, a word originally meaning "pedestal of a sundial," hence by extension the sundial itself. This is from Greek analemma "prop, support" of any kind, such as a sling for a broken arm, from analambanein "to take up; restore, repair," from ana "up" (see ana-) + lambanein "to take" (see lemma). As the name of a tabulated scale in the form of a figure 8, showing the sun's position and equation of time throughout the year, from 1832. updated on September 20, 2022 |