Poly- means many
polychromatic (adj) - having many different colors
polyclinic (n) - a hospital that treats many different kinds of diseases
polydactyl (adj) - having many fingers or toes (more than the normal person
polyglot (n) - a person who knows how to speak, read, or write many languages
polygon (n) - a closed plane figure with many straight lines that connect
polygraph (n) - a machine that writes down many different changes in the body while the person answers questions; a lie detector test
polyhedron (n) - a solid figure with many sides, such as a pyramid
polymorphous (adj) - having or assuming many different forms
polysyllabic (adj) - having many syllables
polytheism (n) - the belief in many different gods