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Definition: an abnormal yellow discoloration of the skin

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  • xor circuit  (Definition: exclusive or; a circuit in a computer that fires only if only one of its inputs fire)
  • xylophone  (Definition: a percussion instrument with wooden bars tuned to produce a chromatic scale and with resonators; played with small mallets)
  • xanthosis
  • yalu river  (Definition: river in eastern Asia; rises in North Korea and flows southwest to Korea Bay (forming part of the border between North Korea and China))