any elementary particle with a strangeness quantum number other than zero.
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- strange attractor,
- strange bedfellows,
- strange interlude,
- strange matter,
- strange quark,
- strange star,
- strange to say,
Origin of strange particle
First recorded in 1955–60; originally so called because of the anomalously long decay time of such particles
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Any of various unstable elementary particles, having a short half-life and a nonzero strangeness quantum number. Sigma and xi baryons, for example, are strange particles.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.