乙烯

乙烯	yǐ xī	ethylene / vinyl
乙	yǐ	second of the ten Heavenly Stems 十天干 / second in order / letter "B" or Roman "II" in list "A, B, C", or "I, II, III" etc / second party (in legal contract, usually 乙方, as opposed to 甲方) / ethyl / bent / winding / radical in Chinese characters (Kangxi radical 5) / ancient Chinese compass point: 105°
乙	zhé	turning stroke (in Chinese characters), aka 折
烯	xī	alkene