atonic

Falls during his atonic seizures resulted in head injuries, so he started to wear a helmet.

From Nature ● Jul. 8, 2014

He then developed atonic seizures, in which his muscle lost tone — his muscles would go limp and he would drop to the ground.

From Nature ● Jul. 8, 2014

Aloe is bitter and astringent, and is used under prescription for some cases of menstrual irregularities, chronic constipation, atonic dyspepsia and worms.

From Time Magazine Archive

The atonic reduplication may also signify plurality, in which case the singular noun would be sagílid, i.e., "at the margin," or "the last"—that is, the slave.

From The Philippine Islands, 1493-1898 — Volume 16 of 55 1609 Explorations by Early Navigators, Descriptions of the Islands and Their Peoples, Their History and Records of the Catholic Missions, as Related in Contemporaneous Books and Manuscripts, Showing the Political, Economic, Commercial and Religious Conditions of Those Islands from Their Earliest Relations with European Nations to the Close of the Nineteenth Century by James Alexander Robertson

Plain water will not dissolve mucus that may have collected in the stomach, and warm water merely dilates that organ, relaxes its fibers, and renders the whole gastric digestive system atonic.

From Psychotherapy by James J. (James Joseph) Walsh