- the state or quality of being strange
- Particle Physics a property of quarks and certain other elementary particles that explains the longer lifetimes of these particles and is expressed as a quantum number with ?1 meaning a particle (strange particle) has strangeness and 0 meaning a particle does not have strangeness
- The quality or condition of being strange.
- Physics a. A quantum property of strange quarks and of hadrons that contain strange quarks that is conserved in electromagnetic and strong interactions, but may not be conserved in weak interactions that cause the decay of strange hadrons.b. The quantum number represented by this property, equal to the difference between the number of strange antiquarks and the number of strange quarks.
See also baryon number
(usually uncountable, plural strangenesses)
From strange +"Ž -ness.