吖啶 ādìng acridine Origin Definitions Defs Strokes Stroke Words Sentences Sents 吖 ā phonetic syllable for transliteration (bound form) Used in transliterating foreign terms, especially chemical names like 吖啶 ādìng啶 dìng phonetic -idine (bound form) used in chemical terms for organic compounds, specifically for nitrogen-containing compounds such as 吡啶 bǐdìng or 嘧啶 mìdìng