Other crossword clues for answer "PERPETUALMOTION"PERPETUALMOTIONNonstop actionScientific impossibility?Mad scientist's dreamObject of many a hopeful machine inventor's searchTheoretical unending phenomenonTheoretical physical conceptPhysics impossibilityPhysicist's fanciful questInventor's impossible goalLongstanding physicists' fascinationPhysicist's "everlasting" questMechanical mirage.Mechanical impossibility.One of the "impossibles."Physicist's fascination.Inventor's dream.Asset of an ideal machineAn impossible dreamAncient scientific questInventor's "impossible dream"Noted Paganini compositionViolation of the first and second laws of thermodynamics... PROPOSAL PROPOSAL PROPOSAL ...Frictionless-environment conceptCounsel's incessant proposal?