Harmonica

n. mouth organ, small musical wind instrument played by inhaling and exhaling into a row of holes

A harmonica is a free reed wind instrument. It has multiple, variably-tuned brass or bronze reeds which are secured at one end over an airway slot in which they can freely vibrate. The vibrating reeds repeatedly interrupt the airstream to produce sound.Unlike most free reed instruments (such as reed organs, accordions, and melodicas), the harmonica lacks a keyboard - instead, the player selects the notes to be played by placing the mouth over the proper airways, usually discrete holes in the front of the instrument. Each hole communicates with one or more reeds, depending on the type of harmonica. Because a reed mounted above a slot is made to vibrate more easily by air from above, reeds accessed by a mouthpiece hole often may be selected further by choice of breath direction (blowing, drawing). Some harmonicas, primarily the chromatic harmonica, also include a spring-loaded button-actuated slide that, when depressed, redirects the airflow.
See more at Wikipedia.org...

Noun
1. a small rectangular free-reed instrument having a row of free reeds set back in air holes and played by blowing into the desired hole
(synonym) mouth organ, harp, mouth harp
(hypernym) free-reed instrument

n. harmonica, mouthorgan, small musical wind instrument played by inhaling and exhaling into a row of holes

n. harmonica, mouth organ, small musical wind instrument played by inhaling and exhaling into a row of holes

adj. harmonious, marked by agreement, compatible; melodious, tuneful, having a pleasant sound