Es·pe·ran·to 
(ĕs′pə-răntō, -rän-)
(ĕs′pə-răntō, -rän-)n.
An artificial international language with a vocabulary based on word roots common to many European languages and a regularized system of inflection.
[After Dr. Esperanto, "one who hopes," pseudonym of Ludwik Lejzer Zamenhof (1859-1917), Polish philologist.]
Es′pe·rantist adj. & n.