pinhole (redirected from pinholes)

pinhole

Archery the exact centre of an archery target, in the middle of the gold zone

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pinhole [′pin‚hōl]

(metallurgy)

A material fault resulting from small blisters that have burst in a casting or that have formed during electroplating.

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pinhole

1. In wood, a round hole usually less than ¼ in. (0.6 cm) in diameter, caused by the boring of a beetle or worm in standing timber.

2. In a plaster coat, a surface defect resulting from trapped air bubbles.

3. In a paint film, one of many small holes caused by: (a) impurities (in the paint, on the paintbrushes or rollers, or on the surface being painted); (b) solvent bubbling; or (c) moisture.

4. In the surface of a ceramic body, glaze, or porcelain enamel, an imperfection characterized by a depression resembling a pinprick.

5. A hole in a structural member through which a pin, 2 passes and connects with another member.