8 letters · 9 points in Scrabble
noun a bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa
originFrom German Arginin, from Ancient Greek ἄργυρος (árguros, “silver”) and ἀργινόεις (arginóeis, “silvery, brightly shining”) in reference to arginine nitrate crystals' silver-white appearance when first refined from lupin seedlings by Ernst Schulze and Ernst Steiger in 1886.
Etymology from Wiktionary, CC BY-SA 3.0