lanolin

The word 'lanolin' is a modern scientific compound, coined in the late 19th century from Latin and chemical nomenclature. Its first element derives directly from the Latin lana, meaning "wool," which traces back to the Proto-Indo-European root \welh₂- meaning "to tear, pull," referencing the plucking or shearing of wool. The suffix -in is a standard scientific ending used to denote neutral chemical substances, particularly fats and proteins. Thus, the term's literal construction, "wool-fat," logically and transparently describes the substance's origin and chemical nature as a greasy secretion found in sheep's wool, later refined for cosmetic and medicinal use.

Structure: lanol (wool) + in (chemical substance) lanol: From Latin lana (wool). in: A chemical suffix, often used in the names of fats, proteins, and other organic substances (e.g., gelatin, protein).