This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Not accented: an atonic syllable.

adj. Pathology Relating to, caused by, or exhibiting lack of muscle tone.

n. A word, syllable, or sound that is unaccented.

adj. Referring to a syllable or sound that is spoken without accent or stress.

adj. Lacking muscle tone.

adj. Characterized by atony, or lack of vital energy.

adj. Unaccented.

adj. Destitute of tone vocality; surd.

n. A word that has no accent.

n. An element of speech entirely destitute of vocality, or produced by the breath alone; a nonvocal or surd consonant; a breathing.

n. A remedy capable of allaying organic excitement or irritation.

In pathology, characterized by atony, or want of tone or power: as, an atonic disease.

In philology: Unaccented. Produced by the breath alone; surd.

n. In medicine, a drug capable of allaying organic excitement or irritation.

n. In philology: A word or syllable that has no accent.

n. An elementary sound produced by the breath; a surd consonant; a breathing.

adj. characterized by a lack of tonus

adj. used of syllables

"The researchers did find that women who used triptans in their second or third trimester were more likely to develop a condition called atonic uterus, in which the uterus fails to contract back to its normal size after delivery."

atonic dyspepsia    atonal   

atony    atonicity    atonia   

unaccented    surd    breathing    weak   

hypochondriacal    noncontiguous    one-mile    black-brown    glacé    fluty    lamellar    population    triliteral    twelve-mile