Epact Scientific Instruments of Medieval and Renaissance Europe

Menu
 Glossary
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 

208 to 217 of 227 glossary terms
tripod base: base of a tripod (three-legged support) on which to stand an instrument.
tripod legs: legs of a tripod (three-legged support) on which to stand an instrument.
tropic of Capricorn: line of geographical latitude and corresponding line of declination coinciding with the sun's position at the autumnal equinox, its most southerly position in the sky.
tympanum: Latin name (plural tympana) for a latitude plate of an astrolabe.
unequal hours: system of hour reckoning, see article on time and date.
universal dial: a sundial that can be used in any latitude.
universal projection: a type of projection of the celestial sphere appropriate for use in any latitude.
vane: upright piece, in this context usually forming a sight and often pierced with a pinhole, a slit, or a slot with a vertical wire.
vertical dial: sundial where the hour lines are marked on a vertical surface, see article on the sundial.
vertical disc dial: sundial where the hour lines are marked on a vertical surface in the form of a disc, see article on the sundial.
Previous | Next || First | Last 
 Show 5 | 10 | 20 | 50 | 100 | 227 terms at a time