plumb

1. 1.

   A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.

   系在线上的小铅块等,建筑工人等用来指示垂直方向。

2. 2.

   A weight on the end of a long line, used by sailors to determine the depth of water.

   长线末端的重物,水手用来测定水深。

3. 3.

   The perpendicular direction or position.

   垂直方向或位置。

长线末端的重物,水手用来测定水深。；垂直方向或位置。；铅锤；垂直

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