流りゅう通つう系けいMeaningsNoun1. flow systemKanji used流current (in a fluid)通pass through系lineageComposed of流りゅう通つうcirculation (of money, goods, etc.); distribution; circulation (of air, water, etc.); ventilation; flowNoun系けいsystem; lineage; group; corollary; system (range of strata that correspond to a particular time period); (taxonomical) seriesNoun