each of the second pair of appendages attached to the cephalothorax of most arachnids. They are variously specialized as pincers in scorpions, sensory organs in spiders, and locomotory organs in horseshoe crabs.
early 19th century: from modern Latin pedipalpi (plural), from Latin pes, ped- 'foot' + palpus 'palp'
pedipalp in other Oxford dictionaries
Definition of pedipalp in the US English dictionary