peroxisome

per·ox·i·some

noun \pə-ˈräk-sə-ˌsōm\

Definition of PEROXISOME

: a cytoplasmic cell organelle containing enzymes (as catalase) which act especially in the production and decomposition of hydrogen peroxide—called also microbody

—per·ox·i·som·al \-ˌräk-sə-ˈsō-məl\ adjective