mouth organ

Từ điển Oxford Learners Wordfinder Dictionary

noun

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
• Syn:
harmonica, harp, mouth harp
• Derivationally related forms:
harpist (for: harp), harp (for: harp)
• Hypernyms:
free-reed instrument