Definitions

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

  • n. A type of immovable articulation, as of a tooth inserted into its bony socket.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a type of fibrous, immovable joint such as the one between the teeth and the alveolar bone

from the GNU version of the Collaborative International Dictionary of English

  • n. A form of union or immovable articulation where a hard part is received into the cavity of a bone, as the teeth into the jaws.

from The Century Dictionary and Cyclopedia

  • n. A kind of synarthrosis or immovable articulation in which one part enters into another like a peg or nail.

Etymologies

Greek gomphōsis, from gomphoun, to fasten with bolts, from gomphos, bolt; see gembh- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From the Greek γόμφος, meaning peg. (Wiktionary)

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