- characterized by a lack of tonus
- used of syllables; "an atonic syllable carries no stress"
- (atonicity) lack of normal muscular tension or tonus
- (Atonia) In medicine, atony (or "atonia", or "atonic") refers to a muscle that has lost its strength. It is frequently associated with the conditions Atonic seizure, atonic colon, uterine atony, gastrointestinal atony (occurs postoperatively) and choreatic atonia.
- Referring to a syllable or sound that is spoken without accent or stress; Lacking muscle tone
- (atonia) Lack of muscle tone
- lacking normal muscle tone