homothetic [hoh-muh-thet-ik, hom-uh-] Word Origin adjective Geometry. similar; similarly placed. Origin of homothetic First recorded in 1875–80; homo- + thetic Related formsho·moth·e·ty [huh-moth-i-tee, hoh-] /həˈmɒθ ɪ ti, hoʊ-/, noun