Jamb

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jamb

[jam]
(building construction)
The vertical member on the side of an opening, as a door or window.
(mining engineering)
A vein or large block of rock that prevents miners from following a vein of ore.

Jamb

The vertical member at the side of a window, door, chimney, or other exterior opening.

jamb

window jamb
door jambs
One of the vertical members at each side of an opening such as a doorframe, window frame, or fireplace.