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key

1. Metal pieces that are notched and grooved and used to open or close a lock.

2. Wedge-shaped stones in an arch that locks its parts together.

KEYS

Little plaster fingers that squeeze through a lath. It holds the plaster in place when hardened.

keystone

An angular block set as the crown of an arch, over a door or window.

kick-out clause

A clause in a sales contract that allows the seller to opt out of the first buyers offer in favor of a second, better offer.

kit home

A prefabricated home that is delivered and put together by a contractor.

knee wall

A structure that is like a wall and used to support the roof rafters.

knob-and-tube wiring

An old type of wiring system that has been replaced by fuses and circuit breakers.