Channel in a toilet that connects the bowl to the waste outlet. It is where the siphonic action takes place. The trapway is measured in terms of the largest diameter ball which can pass through it. Also called the passageway.
Traveling grate
A furnace grate that moves fuel through the combustion chamber.
Traverse rod
A rod on which draperies or curtains are hung.
Travertine
A form of limestone used for a variety of building purposes.
Tread
(1) Flat part, on which you place your foot, of a stair step. (2) The surface of tires, designed to improve traction.
Tread
The horizontal part of a stair step.
Treasury bills
Securities, which have the full backing of the U.S. Government, and are issued by the Treasury Department.
Treasury index
Index used to determine interest rate changes for adjustable rate mortgages.
Treated lumber
A wood product which has been impregnated with chemicals to reduce damage from wood rot or insects. Often used for the portions of a structure which is likely to be in ongoing contact with soil and water. Wood may also be treated with a fire retardant.
Treated seeds
Seeds that have been protected against diseases. They are toxic.
