A childhood or adolescent disorder characterized by excessive activity, emotional instability, significantly reduced attention span, and an absence of shyness and fear, and that occasionally develops in individuals with brain injury, mental defect, or epilepsy.
Is Achoo A Real Word?Every sneeze has a different ring to it, but there are only a few words in English that name the sound. Achoo is the most favored, but is it really a word? Where did achoo come from? This instance of onomatopoeia imitates the sound of sneezing. The first syllable mimics the quick intake of breath, while the second corresponds to the tone of the convulsive expulsion …
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.