Sentence:  [page 170] The term I shall employ is <WSD>"genticide</WSD>", from the Latin "gens" meaning blood-relation or kin. ... [page 253] The metamorphosis of actual incest and <WSD>genticide</WSD> into astral saga was probably promoted by the savage belief that changes in weather and the aspects of the skies were somehow responses to their outrages of lust. 
Meaning of the word marked with <WSD> tags:  The killing of a kinsman or kinswoman; the murder of a blood relative.