from The American Heritage® Dictionary of the English Language, 4th Edition

  • v. Past tense and past participle of countersink.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. Past participle of countersink
  • adj. That has a flat conical top allowing it to be inserted flush with a surface

from the GNU version of the Collaborative International Dictionary of English

  • Chamfered at the top; -- said of a hole.
  • Sunk into a chamfer.
  • Beveled on the lower side, so as to fit a chamfered countersink.


Sorry, no etymologies found.


  • A surgeon drilled an inch and a half into my skull, countersunk a ceramic-encased microchip behind my left ear, and threaded sixteen electrodes into my inner ear.

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  • The computational elements could be countersunk into the skull under the skin, as with cochlear implants.

    World Wide Mind

  • ReinventYourLifeWithPassion. com for universal head rivet and countersunk rivet which type of symbols r used in aircraft part drawing? for universal head rivet and countersunk rivet which type of symbols r used in aircraft part drawing to show blind rivets and solid rivets

    SciFi, Fantasy & Horror Collectibles - Part 1087

  • The lower right quadrant, if it has anything in it, will be a “C”, to indicate that the butt side of the rivet is to be countersunk, (such as a double flush plug) for the NACA method (82 degrees, rather than the 100 degrees for under a manufactered head).

    SciFi, Fantasy & Horror Collectibles - Part 1087

  • But the 1208P-caliber movement that powers Piaget's new launch overcomes this by using a micro-rotor countersunk into the movement.

    Slim Elegance Is Back

  • My wedding cake had cardboard *under* the fondant to provide structural support for the upper layers rather than countersunk dowels.

    It's In There

  • Anybody know the Spanish words for, countersink and countersunk?


  • Each screw was countersunk into the wood so far that the board expanded over it and the screw rusted.

    The Turn of the Screw - And She Knits Too!

  • For example, they have little fringes on their feet to help them run across sand, a countersunk jaw for burrowing in sand, little ear flaps to cover their tympana, cryptic coloration to hide on the sand, and a very glossy belly to reflect heat.

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  • We wanted flush mounted flat head screws in the cor-ten rainscreen, so we used a thicker cor-ten panel ~1/8″ and countersunk the fasteners.

    Build Blog » Rainscreens


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