heliotroper

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• Heliotroper — He li*o*tro per, n. The person at a geodetic station who has charge of the heliotrope. [1913 Webster] …   The Collaborative International Dictionary of English

• Heliotrope (instrument) — The heliotrope is an instrument that uses a mirror to reflect sunlight over great distances to mark the positions of participants in a land survey. The heliotrope was invented by the German mathematician Carl Friedrich Gauss. [… …   Wikipedia