atonic

• POS: Adjective, Noun
• HYPHEN: a=ton=ic

CIDE DICTIONARY

atonic, a. [Cf. F. atonique. See Atony.].

•  Characterized by atony, or lack of vital energy; as, an atonic disease.  [1913 Webster]
•  Unaccented; as, an atonic syllable.  [1913 Webster]
•  Destitute of tone vocality; surd.  Rush.  [1913 Webster]

atonic, n. 

•  A word that has no accent.  [1913 Webster]
•  An element of speech entirely destitute of vocality, or produced by the breath alone; a nonvocal or surd consonant; a breathing.  Rush.  [1913 Webster]
•  A remedy capable of allaying organic excitement or irritation.  Dunglison.  [1913 Webster]

OXFORD DICTIONARY

atonic, adj.
1 without accent or stress.
2 Med. lacking bodily tone.

Derivative

atony n.