乙 yǐ — the second of the ten Heavenly Stems; second 乙 yǐ Level 1 · Common HSK 5 #2 yǐ yi3 Basic definition noun the second of the ten Heavenly Stems; second e.g 乙方乙型乙醇 noun ethyl (used in chemistry names) e.g 乙烯乙炔乙醚 Detailed explanation adjective (象形。甲骨文字形。本义:象植物屈曲生长的样子) winding e.g 乙乙 second noun the second of the ten Celestial Stems one e.g 某甲某乙 gill bone tail bone of tiger verb roll Related words 乙肝 yǐ gān hepatitis B 乙方 yǐ fāng Party B (in a contract) 乙炔 yǐ quē acetylene 乙脑 yǐ nǎo Japanese encephalitis (B) 乙醚 yǐ mí ether 乙烯 yǐ xī ethylene 乙醇 yǐ chún ethanol; ethyl alcohol; alcohol; spirits; grain alcohol; C2H5OH; drinking alcoho 乙型 yǐ xíng type B; second (of the Heavenly Stems)