pistachio
pis·ta·chio [pistachio pistachios] [pɪˈstæʃiəʊ] [pɪˈstæʃioʊ] [pɪˈstɑːʃiəʊ] [pɪˈstɑːʃioʊ] noun
(pl. pis·ta·chios)
1. (also piˈstachio nut) countable the small green nut of an Asian tree
2. uncountable a pale green colour
Word Origin:
late Middle English pistace, from Old French, superseded in the 16th cent. by forms from Italian pistaccio, via Latin from Greek pistakion, from Old Persian.