腺嘌呤 xiànpiàolìng adenine, adenine nucleotide Origin Definitions Defs Strokes Stroke Words Sentences Sents 腺 xiàn noun gland gland; organ or group of cells that produces and secretes chemical substances嘌呤 piàolìng purine (loanword) purine; a heterocyclic organic compound that forms colorless crystals and is a key component of nucleic acids