The apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves.

plural of 78

(organic chemistry) Any of a group of thiazole antibiotics based on methyl (2E,4R,5S,6E)-3,5-dimethoxy-4-methyl-7-[2-(2-propan-2-yl-1,3-thiazol-4-yl)-1,3-thiazol-4-yl]hepta-2,6-dienoate

Alternative form of rah-rah