from The Century Dictionary.
- noun 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun medicine A
trepanhaving a conicalshape so that injurious penetrationof the brainis impossible.
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Ancient Greek ἀβάπτιστος (abaptistos, "not dipped").
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