Etymology: Medieval Latin turcopulus, turcopolus, from Middle Greek tourkopoulos, literally, son of a Turkish, from Late Greek Tourkoi (plural) Turks (from Turkish Türk Turkish) + Middle Greek -poulos child of, alteration (probably influenced by Latin pullus young of an animal) of Greek pōlos young animal, young man or woman — more at foal
: a light-armed soldier of the Order of St. John of Jerusalem
Useful english dictionary. 2012.