IPA: //ˈbjuːtɪl//
KK: /ˈbjuːtɪl/
A type of hydrocarbon group that comes from butane, consisting of four carbon atoms and nine hydrogen atoms, often used in various chemical applications.
Butyl groups are commonly found in many organic compounds and are important in the production of plastics.
Butyl comes from the word 'butyric' (from Latin 'butyrum', meaning butter) and the suffix '-yl' (used in chemistry to denote a radical or group). The term 'butyl' refers to a group derived from butyric acid, which is related to butter.
Think of 'butyric' which relates to butter, and remember that 'butyl' refers to a chemical group associated with that butter-like compound.