wristdrop

or wrist-drop

[rist-drop]
noun Pathology.
  1. paralysis of the extensor muscles of the hand causing it to droop, due to injuries or some poisons, as lead or arsenic.

Origin of wristdrop

First recorded in 1835–45; wrist + drop
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018