(physics) The naturally-occurring radioactive isotope of vanadium, ⁵⁰₂₃V, having twenty-three protons and twenty-seven neutrons; its half-life is 1.5 x 10¹⁷ years

Alternative form of 50s

plural of 50-gon

(European politics) Article 50 of the Treaty of Lisbon which holds the EU's exit clause, allowing and setting out rules for countries leaving the European Union.

plural of 50 cent

(US, derogatory) Cheap.

(derogatory) Synonym of wumao: A member of the 50 cent army.

(music) A chord progression, l–vi–IV–V, used in Western popular music, particularly common in the 1950s and early 1960s.

Internet users who are paid by the authorities of the People's Republic of China to spread propaganda and disinformation on their behalf.

Alternative form of 50 cent army