Studies on the effectiveness of cranberry juice for preventing or treating UTIs have produced mixed results. The red berry contains a tannin that prevents E. coli bacteria - the most common cause of urinary tract infections - from sticking to the walls of the bladder, where they can cause infection.
primary color for pigments - any of three pigments from which all colors can be obtained by mixing; the primary colors for pigments are red, blue, and yellow. primary colour for pigments. primary color, primary colour - any of three colors from which all others can be obtained by mixing.
The Primary Colors. This is one of the first lessons to teach a little one. Red, blue, and yellow are the primary colors. These are called the primary colors because there is no way to mix these colors. Together, they mix all the other colors the human eye can see, using black and white as well.