nectarivorous,a.|nɛktəˈrɪvərəs| [f. L. nectar (Gk. νέκταρ) nectar + -i- + vor-us devouring + -ous, after carnivorous a., etc.] Of birds or insects: feeding on the nectar of flowers. 1898Ann.Rep. Board of Regents Smithsonian Inst. 1896 421 The nectarivorous insects localize their action upon these nectaries.