SOPORIFEROUS Meaning of SOPORIFEROUS in English [sop.o.rif.er.ous] adj [L soporifer soporiferous, fr. sopor + -fer -ferous] (1590): soporific -- sop.o.rif.er.ous.ness n Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012