The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. [ Photo- + heliometer. ] (Astron.) A double-lens instrument for measuring slight variations of the sun's diameter by photography, utilizing the common chord of two overlapping images. [ Webster 1913 Suppl. ]
เพิ่มคำศัพท์
ทราบความหมายของคำศัพท์นี้? กด เพื่อใส่คำนี้พร้อมความหมาย เพื่อเป็นวิทยาทานแก่ผู้ใช้ท่านอื่น ๆ
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