内ない在ざい性せいレトロウイルスMeanings1nounendogenous retrovirus; ERVbiochemistryA retrovirus that has integrated into the host genome and is inherited. Used in genetics and virology contexts.内ない在ざい性せいレトロウイルスはヒトゲノムの約やく8%を占しめている。Endogenous retroviruses make up about 8% of the human genome.