A word with two meanings:
 In writing, the five letters a e I o u.
 In speech, sounds made with the mouth open and the airway unobstructed (by contrast with consonants, where the flow of air is briefly obstructed in some way). The exact number of vowels depends on regional accent, but there are more than twenty English vowels.
For Scientific english editing and Medical Writing Services visitwww.manuscriptedit.com
