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WordNet-Online 
 Definitions from WordNet | ||||
| Definitions from the WebTrephinationDescription:Trephination is a surgical procedure that involves making a hole or opening in the skull to treat various medical conditions or relieve pressure. Sample Sentences:Noun: 
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| trente-et-quarante trentino-alto adige trento trenton trepan trepanation trepang trepedation trephination trephine trephritidae trepid trepidacous trepidate trepidation trepidation antonym  trepidations 
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