undercut (redirected from retentive undercut)

undercut

Forestry chiefly US and Canadian a notch cut in a tree trunk, to ensure a clean break in felling

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undercut [′ən·dər‚kət]

(electronics)

Undesirable lateral etching by chemicals in the fabrication of semiconductor devices.

(engineering)

Underside recess either cut or molded into an object so as to leave a topside lip or protuberance.

(metallurgy)

An unfilled groove melted into the base metal at the toe of a weld.

To fail to machine a part to a sufficient extent.

(mining engineering)

To cut below or in the lower part of a coal bed by chipping away the coal with a pick or mining machine; cutting is usually done on the level of the floor of the mine, extending laterally the entire face and 5 or 6 feet (1.5 or 1.8 meters) into the material.

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undercut

1. In stonework, to cut away a lower part, leaving a projection above that serves the function of a drip.

2. To rout a groove or channel (a drip) back from the edge of an overhanging member.