In addition to its importance for animal cell structure, cholesterol also serves as a precursor for the biosynthesis of steroid hormones, bile acid, and vitamin D. Cholesterol is the principal sterol synthesized by all animals. In vertebrates, hepatic cells typically produce the greatest amounts.
The name Dougal is of Scottish origin. The meaning of Dougal is dark stranger. Dougal is generally used as a boy's name. It consists of 6 letters and 2 syllables and is pronounced Dou-gal.
Wiktionary(1.50 / 2 votes)Rate this definition: 1  darkness(Noun) The state of being dark; lack of light. 2  darkness(Noun) Gloom. 3  darkness(Noun) The product of being dark. 4  darkness(Noun) The state or quality of reflecting little light, of tending to a blackish or brownish color.