vomiturition

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Forceful attempts at vomiting without bringing up the contents of the stomach; retching.

Century Dictionary and Cyclopedia

1. n. Ineffectual attempts to vomit; retching.
2. n. The vomiting of but little matter, or vomiting with little effort.

Wiktionary

1. n. medicine Repeated ineffectual attempts at vomiting; retching.

GNU Webster's 1913

1. n. An ineffectual attempt to vomit.
2. n. The vomiting of but little matter; also, that vomiting which is effected with little effort.