Lipid

Definition

Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others. They are hydrophobic or amphiphilic small molecules that play critical roles in energy storage, cellular structure composition, and signaling processes within organisms.

Related terms

Fatty Acids:

Long hydrocarbon chains with a carboxylic acid group at one end; they are the building blocks of many types of lipids.

Phospholipids:

A type of lipid that forms the primary component of cell membranes due to its amphiphilic properties allowing it to form bilayers.

Sterols: A subgroup of steroids with a hydroxyl group at position three; they serve as important components in cell membranes and precursors for steroid hormones