Plumb n. 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.
... of amateur carpenter tools. You do not need to say that you are an amateur. The dealer will find that out when you ask him for an easy-running broad-ax or a green-gage plumb line. He will sell you a set of amateur's tools that will be made of old sheet-iron with basswood handles, and the saws will double up like ... — Remarks • Bill Nye
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