ULP

ULP (plural ULPs)

1. (biochemistry) Initialism of ubiquitin-like protein.
2. (astronomy) Abbreviation of ultra-luminous pulsar.
3. (US politics) Initialism of unfair labor practice.
   • 1996 May, The Judge Advocate General's School, “The Representation Process”, in The Law of Federal Labor-Management Relations‎, Charlottesville: US Army, JA 211, page 21:

     Settlement of an ULP charge which required the parties to reopen the existing collective bargaining agreement did not remove the collective bargaining agreement as a bar.

• ULX (“ultralunimous x-ray”)

• PLU, UPL, pul