11 letters · 16 points in Scrabble
noun a wave motion
noun an instance of change; the rate or magnitude of change
noun the quality of being unsteady and subject to changes
originBorrowed from Latin fluctuatiōnem, accusative singular of fluctuatiō, from fluctuō, from fluctus. Morphologically fluctuate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0