The Collaborative International Dictionary of English v.0.48:
Convulsionary \Con*vul"sion*a*ry\, a. [Cf. F. convulsionnaire.] Pertaining to convulsion; convulsive. "Convulsionary struggles." --Sir W. Scott. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Convulsionary \Con*vul"sion*a*ry\, n. A convulsionist. [1913 Webster]