Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A trepan having a conical shape so that injurious penetration of the brain is impossible.

from The Century Dictionary and Cyclopedia

  • n. In surgery, an old form of trepan, the crown of which was made conical, or provided with a ring, collar, or other contrivance, to prevent it from penetrating the cranium too far.

Etymologies

From Ancient Greek ἀβάπτιστος (abaptistos, "not dipped"). (Wiktionary)

Examples

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