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groma

[ groh-muh ]

noun

  1. an instrument having a cruciform wooden frame with a plumb line at the end of each arm, used for laying out lines at right angles to existing lines.


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Word History and Origins

Origin of groma1

< Latin grōma, grūma, by dissimilation < Greek gnôma, presumably with sense of gnṓmōn carpenter's square; gnomon

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Grolier de Servièresgrommet