unsaturated
/ʌnˈsætʃəreɪtɪd; ʌn`sætʃəˌretɪd/ adj
1 not saturated 未浸透的; 未充满的.
2 (chemistry 化) (esp of an organic compound) that can combine with hydrogen, to form a third substance by the joining of molecules （尤指有机化合物）不饱和的, 未饱和的. Cf 参看 polyunsaturated.