Definition of "trephines" []

• Plural form of trephine. (noun)
• Third-person singular simple present indicative form of trephine. (verb)

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• "With few exceptions, therefore, designed to meet emergencies, my set of instruments formed a supplement to the actual necessities carried by the Service hospitals, and was as follows: -- 4 trephines, Horsley's elevator, brain knife and seeker."
• "He should also have small scalpels, tooth trephines, and files."
• "Lambing waited for no man, and it certainly didn’t wait for little boys who were recovering from trephines."