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Early astronomical instrument
Answer for the clue "Early astronomical instrument ", 6 letters:
gnomon
Alternative clues for the word gnomon
Word definitions for gnomon in dictionaries
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
"vertical shaft that tells time by the shadow it casts" (especially the triangular plate on a sundial), 1540s, from Latin gnomon , from Greek gnomon "indicator," literally "one who discerns," from gignoskein "to come to know" (see gnostic (adj.)).
Wikipedia
Word definitions in Wikipedia
Gnomon . Kritische Zeitschrift für die gesamte klassische Altertumswissenschaft (Gnomon: Critical Journal of the Entire Field of Scholarship on Classical Antiquity) is a German review journal covering the classics . It was established in 1925, first published ...
Wiktionary
Word definitions in Wiktionary
n. 1 The pointer on a sundial. 2 (context geometry English) A plane figure formed by removing a parallelogram from a corner of a larger parallelogram.
Usage examples of gnomon.
Shadows cast by innumerable stone towers combed the dark blue water, all pointing in the same transitory direction, as if the stony pinnacles were gnomons to a half-thousand igneous sundials, tracking in unison the serene march of hours, of aeons.
He named stars of the wild goat, or Capricorn, those where the sun, having reached the highest point in his annuary tract, rests at the summit of the horary gnomon, and imitates the goat, who delights to climb the summit of the rocks.
Newton was constructing a sundial on a south-facing wall, using, as gnomon, a slender rod with a ball on the end.