PEX is cross-linked polyethylene, a form of polyethylene with cross-links.
PEX or Pex may also refer to:
Science and technology Peer exchange, a method to gather peers for BitTorrent PHIGS Extension to X, in programming Pex, a unit testing framework for the .NET programming languages Pexeso Inc., a digital rights technology company Physical examination, in medicine Plasma exchange, a form of plasmapheresis Potassium ethyl xanthate, an organosulfur ligand used as a flotation agent in the mining industry to separate metallic ores Pseudoexfoliation syndrome, a condition related to glaucoma Parasitic extraction, a tool in IC Layout Design, used for extracting parasitic elements and seeing their effects on the circuit
Other Palestine Exchange, a stock exchange People Express Airlines (1980s) PEX, operators of OPEX stock exchange Pex, a character in the Doctor Who story Paradise Towers The Polar Express, a children's book and related film, video game and soundtrack
See also PXE (disambiguation)