lippide

Lippide is a term that appears in only a small number of sources and is not recognized as a distinct chemical class in modern chemistry. In contemporary usage, the spelling lipid (or lipide in some languages) is standard, and lippide is typically treated as a misspelling or an archaic/nonstandard variant of that term. When encountered, it is usually best to verify the spelling with the original source.

Lipids are a broad and diverse group of hydrophobic or amphipathic organic molecules. They are essential for biological systems because of their roles in energy storage, cellular membranes, insulation, and signaling. Their common property is low solubility in water and higher solubility in nonpolar solvents, reflecting their mostly hydrocarbon structure.

Classification of lipids generally includes several major groups. Simple lipids, such as fats and oils, are esters of fatty acids with alcohols (commonly glycerol). Compound lipids include phospholipids and glycolipids, which contain additional functional groups. Derived lipids are substances obtained from lipids through chemical reactions, such as fatty acid derivatives and steroids. There are also specialized lipids, including sphingolipids and terpenoid lipids, each with distinct structural features and biological roles.

In sum, while lippide may appear in some texts, it does not designate a separate biological category. The accepted term is lipid, referring to a wide class of fat-like substances with important structural and metabolic functions in living organisms.