tar·si·oid I. \ˈtärsēˌȯid\adjective Etymology: in sense 1, from New Latin Tarsioidea; in sense 2, from tarsier + -oid 1.: of or relating to the Tarsioidea < a tarsioid prosimian > 2.: resembling or resembling that of a tarsier < a tarsioid foot > < a tarsioid stage of development > II. noun (-s) : a tarsioid primate : tarsier