The article presents research findings related to vocabulary acquisition in English for Specific Academic Purposes (ESAP). To explore the impact of two complementary / blended learning procedures on receptive and productive aspects of vocabulary acquisition in ESAP, a quasi-experimental research design was adopted, with both pre- and post-treatment tests, experimental and control groups, but no random assignment of respondents. IBM SPSS Statistics 20.0 was employed to conduct the preliminary processing of the collected data and their statistical analysis.