A minor 9th chord
Am9 chord for piano with keyboard diagram. 
  Explanation: The A minor ninth  is a five-note chord. For practical reasons the chord is normally played with omitted notes and/or inverted. The chord is often abbreviated as Am9. 
  Omissions: Am9(no3): A - E - G - B; Am9(no5): A - C - G - B. 
  Theory: The Am9 chord is constructed with a root, a minor third, a perfect fifth, a minor seventh and a major ninth. 
Am9

Notes: A - C - E - G - B
Abm9 chord ‹ Previous • Next › A#m9 chord
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One of many possible inversions (Am9/G)

Notes: A - C (left hand) E - G - B (right hand)
Two-hand voicing
Am9 inversions and voicings

One of many possible inversions (Am9/G)

Notes: A - C (left hand) E - G - B (right hand)
Two-hand voicing