the GNU version of the Collaborative International Dictionary of English
n. One who has convulsions; esp., one of a body of fanatics in France, early in the eighteenth century, who went into convulsions under the influence of religious emotion.
The Century Dictionary and Cyclopedia
n. A eonvulsionary.
n. In geology, a catastrophist.
Word Usage
"'convulsionist' orgies which, under the Regency, desecrated the tomb of"