plumb line   (TTS Sound)

The plumb_line has 1 Senses.

• plumb line, perpendicular
• 下げ振り糸, 垂球糸, 測鉛線
• a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point
• 金属のおもりが地球の重力の中心を直接差し示すよう吊り下げられているひも