The word biscotto, in this sense, shares its origin with the British-English (via Old French) word "biscuit", which refers to what American-English-speakers call a "cookie". In modern Italian, the word biscotto refers to any cookie or cracker, just as does the British use of the word "biscuit".
With lightly floured hands roll dough into 1 inch balls. Coat balls in egg whites, shaking off excess, then roll in pine nuts, pressing lightly to stick. Arrange balls on cookie sheets, and flatten slightly to form a 1 1/2 inch round. Bake 15 to 18 minutes in the preheated oven, or until lightly browned. Let stand on cookie sheet 1 minute.