9 letters · 10 points in Scrabble
noun (biochemistry) a nucleoside that is a structural component of nucleic acids; it is present in all living cells in a combined form as a constituent of DNA and RNA and ADP and ATP and AMP
originFrom German Adenosin, corresponding to aden(ine) + (rib)os(e) + -ine.
Etymology from Wiktionary, CC BY-SA 3.0