1 ผลลัพธ์ สำหรับ *dioptra*
หรือค้นหา: dioptra, -dioptra-

Collaborative International Dictionary (GCIDE)
Dioptra

{ ‖ } n. [ L. dioptra, fr. Gr. &unr_;. See 2d Dioptric. ] An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc. [ 1913 Webster ]

Variants: Diopter

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