Definition of genos:
(N) :
In ancient Greece, a genos (Greek: γένος, "race, stock, kin",γένος, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus plural γένη genē) was a social group claiming common descent, referred to by a single name (see also Sanskrit "Gana").
(N) :
A genos was a type of social group in ancient Greece.