from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Difficulty in articulating words, caused by impairment of the muscles used in speech.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Difficulty in articulating words due to disturbance in the form or function of the structures that modulate voice into speech. One of first indicative symptoms of myasthenia gravis brought about by an auto-immune response to acetylcholine receptors.
from The Century Dictionary and Cyclopedia
- n. In pathology, inability to articulate distinctly; dyslalia.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. impaired articulatory ability resulting from defects in the peripheral motor nerves or in the speech musculature
dys- + Greek arthron, joint, (vocal) articulation.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Greek dys- (mis-, accidental) and arthrosis ἄρθρωσις (articulation). (Wiktionary)