Home › Words › W › weismannismweismannismweismannism means the principle that hereditary information moves only from genes to body cells, and never the other way round.Among words judged in Lexicurio's Arena, weismannism ranks #16,730 of 42,747 for Qualifying.EtymologyFrom Weismann + -ism, after August Weismann, who proposed the theory.nounThe principle that hereditary information moves only from genes to body cells, and never the other way round.Definitions & examples from Wiktionary (CC BY-SA 3.0).