lipovaccine 1. A vaccine prepared by suspending the microorganisms in vegetable oil. Absorption of antigenic material is thereby delayed. 2. A vaccine having a vegetable oil as a solvent. Related 'bovine; cow, ox, bull' word units: bou-; bovo-; ox-; tauro-. Found on http://www.wordinfo.info/words/index/info/view_unit/2256/