keyhole
/ˈkiˌhoʊ̯l/ noun C2- The hole in a lock where the key is inserted and turns.
- Any small opening resembling the hole for a key in shape or function; especially, one that gives a vista of, or access to, a space beyond.
- A small incision through which surgical instruments can reach into an anatomic space beyond.
- A circle cut out of a garment as a decorative effect, typically at the front or back neckline of a dress.
- A hole or excavation in beams intended to be joined together, to receive the key that fastens them.
- A mortise for a key or cotter.
- A transient column of vapor or plasma formed when using high energy beams, such as lasers, for welding or cutting. · laser keyhole welding· keyhole plasma
- A welding method in which a hole forms in the surface immediately ahead of the puddle in the direction of welding. The hole is filled as the weld progresses.
Plural keyholes
From the library
He, through the keyhole, maketh glad;
Come back here, out of a line with that keyhole.
The door was closed, but I looked through the keyhole, and saw him so pale and haggard, that believing him very ill, I went and told M.
The brigadier had put his eye to the keyhole, and had discovered Andrea in a posture of entreaty.
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