Definition of "geometer" [ge•om•e•ter]

• A mathematician who specializes in geometry. (noun)
• Any species of geometrid moth. (noun)

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• "Medieval artists often portrayed Christ, the creative Word of God, as a heavenly "geometer", compass in hand, who orders the cosmos with infinite wisdom and purpose."
• "Apollonius of Perga was a Greek geometer and astronomer noted for his writings on conic sections."
• "Even math-phobes have the name of that ancient Greek geometer filed away in their consciousness."