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It is a musical instrument that makes sounds by vibrating strings (for example, violin, guitar).
Membranophones Chordophones Idiophones Percussion
Idiophones, Membranophones, Aerophones,Chordophones, and Electrophones
Banjo
All can be considered as a percussion instrument but the Chordophone is not really a "Main" category in percussion. The two major category in percussion are Membranophones and Idiophones but there are chordophones that can be considered as a percussion instrument. An example of this is the piano. It produces sounds by its strings so its a chordophone but the strings are hit by little hammer so that they would vibrate and produce sound.
chordophones (BOOM)
The instruments that creates sounds from a string tremor stretched out in both ends is called Chordophones. The popular example of this category is guitar.
All can be considered as a percussion instrument but the Chordophone is not really a "Main" category in percussion. The two major category .
Chordophones A+
You actually answered your own question. Stringed instruments are considered to be part of the string family.
The five main classes of instruments are idiophones, membranophones, aerophones, chordophones, and electrophones. Fresh fruit does not fall under any of these categories.
Pianos can be classified as either a stringed or percussion instrument... Quoth the wikipedia... "It is sometimes classified as both a percussion and a stringed instrument. According to the Hornbostel-Sachs method of music classification, it is grouped with Chordophones."