venipuncture Syllabification: (ven·i·punc·ture)Pronunciation: /ˈvēnəˌpəNGkCHər, ˈvenə-/ (chiefly British also venepuncture)Definition of venipuncture noun the puncture of a vein as part of a medical procedure, typically to withdraw a blood sample or for an intravenous injection. Origin: 1920s: from Latin vena 'vein' + puncturevenipuncture in other Oxford dictionaries Definition of venipuncture in the British & World English dictionary