PLUMBING n. 2 definitions
The art of casting and working in lead, and applying it to building purposes; especially, the business of furnishing, fitting, and repairing pipes for conducting water, sewage, etc. Gwilt.
PLUMBISM n.
A diseased condition, produced by the absorption of lead, common among workers in this metal or in its compounds, as among painters, typesetters, etc. It is characterized by various symptoms, as lead colic, lead line, and wrist drop. See under Colic, Lead, and Wrist.
PNEUMATIC; PNEUMATICAL a.
mpressed air from the wind chest to move them. -- Pneumatic dispatch, a system of tubes, leading to various points, through which letters, packages, etc., are sent, by the flow and pressure of air. -- Pneumatic elevator, a hoisting machine worked by compressed air. -- Pneumatic pile, a tubular pile or cylinder of la…
PRINCIPAL n.
A leader, chief, or head; one who takes the lead; one who acts independently, or who has controlling authority or influence; as, the principal of a faction, a school, a firm, etc.; -- distinguished from a subordinate, abettor, auxiliary, or assistant.