Cerides or waxes
The waxes are lipids that are obtained by esterification of one fatty acid long chain (14 to 36 carbon atoms) with a monoalcohol, also long chain (16 to 30 atoms carbon).
The result is a completely apolar molecule, very hydrophobic, since no charge appears and its structure is of considerable size.
This characteristic allows the typical function of waxes to consist of serving as a waterproofing agent. The coating of young leaves, fruits, flowers or thalli, as well as the integuments of many animals, hair or feathers is covered with a waxy layer to prevent the loss or entry (in small animals) of water.
They can also appear mixed with free fatty acids and steroids, as in beeswax, spermaceti from whales, lanolin or protective wool wax, earwax from the ear canal, etc.