A white, inodorous substance which crystallizes with water in beautiful pearly plates, is insoluble in water but soluble in ether and hot alcohol, and melts at i485 degrees C. It enters into the composition of gallstones, the human bile, brain and nerve substance, being present in bile to the extent of about 025 per cent, and in brainmatter to about 1 per cent. It can be sublimed without decomposition at about 300″ 2. in vacuo. Its formula is sometimes expressed as

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Definition of  CHOLESTEROL