noun
trepanation; trephination
Medical term for drilling or scraping a hole into the skull, typically for surgical access or to relieve pressure.
穿頭は頭蓋内圧を下げるために行われることがある。
Trepanation is sometimes performed to reduce intracranial pressure.
古代の穿頭術の痕跡が頭蓋骨に残っていた。
Traces of ancient trepanation were left on the skull.