planisphere
/ˈpleɪ.nɪˌsfɪɚ/
planisphere means any representation (map projection) of part of a sphere on a plane surface. It carries an Arena rating of 1565, earned across 2 head-to-head judged battles.
Among words judged in Lexicurio's Arena, planisphere ranks #968 of 17,142 for Most Ingenious Words, #1,596 of 17,149 for Most Exacting Words, #2,366 of 17,124 for Most Sublime Words, #3,436 of 17,128 for Most Ponderous Words.
planisphere is pronounced /ˈpleɪ.nɪˌsfɪɚ/.
Why “planisphere” is a great word
A two-dimensional map projection of a sphere, particularly the celestial sphere, onto a flat plane, typically manifesting as a circular star chart with a rotating overlay to simulate the night sky’s motion. Its name descends from the Medieval Latin planisphaerium, a compound of planus (“flat, plane”) and sphaera (“sphere”). Unlike a globe, which preserves the spherical truth in three dimensions, or an astrolabe, a multifunctional engine of brass and calculation, the planisphere is a humble compromise between cosmos and paper—the whisper of turning parchment under a dim torch, the patient alignment of date and hour through a little window, the tracing of imagined lines between pinprick stars on a vast, flat disk. It is a portable cosmos that fits in a pocket, a quiet reminder that we often understand the infinite only by making it small.
Etymology
From plani- + sphere or plani- + -sphere.
noun
- Any representation (map projection) of part of a sphere on a plane surface.
- A map constructed by stereographic projection, as described in Ptolemy's treatise Planisphaerium and later used in planispheric astrolabes
- A map of the whole world, especially those from the 16th–17th century
- Any of several charts of the celestial sphere having an overlay or window that may be adjusted to show the stars visible at a particular time, or from a particular place.
Definitions & examples from Wiktionary (CC BY-SA 3.0).
Words closest in meaning
By meaning, not spelling — each word's AI semantic fingerprint, nearest first.
- planetarium 59% match — A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling. vs planisphere →
- meteoroscope 57% match — An astrolabe; a planisphere. vs planisphere →
- cosmosphere 56% match — An apparatus from the 19th century for showing the position of the Earth in relation to the stars, consisting of a hollow glass globe marked with stars and constellations, surrounding a terrestrial globe. vs planisphere →
- spherograph 54% match — An instrument for facilitating the practical use of spherics in navigation and astronomy, constructed of two cardboards containing various circles, turning upon each other in such a manner that any possible spherical triangle may be readily found, and the measures of the parts read off. vs planisphere →
- planetscape 52% match — The landscape of the surface of a planet. vs planisphere →
- cosmogram 52% match — A flat geometric figure depicting a cosmology vs planisphere →
- planet 52% match — Each of the seven major bodies which move relative to the fixed stars in the night sky—the Moon, Mercury, Venus, the Sun, Mars, Jupiter and Saturn. vs planisphere →
- unsphere 51% match — To remove from a sphere, as in celestial bodies; to remove from the heavens. vs planisphere →