The hand gesture associated with Lord Krishna in Hindu iconography is called the "flute-playing gesture" or "flute-playing pose." In this gesture, Lord Krishna is often depicted holding a flute with one hand while the other hand is raised in a graceful gesture.
This gesture symbolizes Lord Krishna's divine playfulness and his role as a divine musician. The flute is a central element in the depiction of Lord Krishna, representing his ability to enchant and captivate devotees with his melodious music. It also signifies his deep connection with nature and his ability to evoke joy and transcendence through his music.
The raised hand in the flute-playing gesture can take various forms, each with its own significance. Sometimes the fingers are arranged in a specific mudra (hand gesture), such as the "abhaya mudra" (gesture of reassurance and protection) or the "varada mudra" (gesture of boon-granting or blessing), further emphasizing Lord Krishna's divine attributes of protection, benevolence, and grace.
Overall, the gesture of Lord Krishna's hand while playing the flute is a powerful symbol of his divine presence, his ability to inspire devotion and love, and his eternal playfulness.