lipid

The word 'lipid' is a modern scientific coinage from the early 20th century, directly constructed from classical components. Its first element, 'lip-', is derived from the ancient Greek noun 'lipos' (λίπος), which meant fat, grease, or animal tallow. This root was chosen for its precise, literal meaning relevant to the substance's properties. The suffix '-id' is a common scientific formative, borrowed from Greek and used to denote a substance belonging to a particular class, similar to its use in words like 'chloride' or 'peptide'. Thus, the term's logic is transparent: it literally names a 'fat-like' chemical substance, accurately reflecting its greasy, hydrophobic nature central to its biological functions in cell membranes and energy storage.

Structure: lip (fat) + id (chemical suffix) lip originates from Greek 'lipos', meaning fat or grease. id is a scientific suffix of Greek origin, often used to form names of chemical substances.