sterol

Any of a group of predominantly unsaturated solid alcohols of the steroid group, such as cholesterol and ergosterol, present in the fatty tissues of plants and animals.

any member of a class of steroids containing a hydroxyl group in the 3-position of the A-ring; they are found in all animal and plant tissue and play an important role in hormone chemistry

any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances