mural circle
noun1
A large circle marked with degrees, etc., fixed to a wall, for measuring arcs of the meridian.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
A large circle marked with degrees, etc., fixed to a wall, for measuring arcs of the meridian.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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