6 results for: plumb line
plumb line
–noun
| 1. | a cord with a lead bob attached to one end, used to determine perpendicularity, the depth of water, etc. Compare plumb (def. 1). |
| 2. | plumb rule. |
[Origin: 1530–40
]
] | Dictionary.com Unabridged (v 1.1) Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006. |
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plumb line
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| plumb line
n.
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| The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2006 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. |
| plumb line | |
noun | |
| 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 |
| WordNet® 3.0, © 2006 by Princeton University. |
| plumb line
Audio Help (plŭm) Pronunciation Key
A line regarded as directed exactly toward the Earth's center of gravity. |
| The American Heritage® Science Dictionary Copyright © 2002 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. |
Plumb line
Plumb\, n. [F. plomb, L. plumbum lead, a leaden ball or bullet; cf. Gr. ?, ?, ?. Cf. Plummet, Plunge.] A little mass or weight of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction; a plummet; a plumb bob. See Plumb line, below. Plumb bob. See Bob, 4. Plumb joint, in sheet-metal work, a lap joint, fastened by solder. Plumb level. See under Level. Plumb line. (a) The cord by which a plumb bob is suspended; a plummet. (b) A line directed to the center of gravity of the earth. Plumb rule, a narrow board with a plumb line, used by builders and carpenters.| Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc. |
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