Strange matter
strange matter
A hypothetical, extremely dense form of matter composed entirely of strange quarks. These quarks are not grouped into separate particles (like the quarks bundled into protons and neutrons in atomic nuclei) but form a single undifferentiated mass. The material of which hypothetical quark stars are composed is thought to be strange matter; some evidence for strange matter has also been found in collisions in particle accelerators and in seismic events possibly triggered by the passing of strange matter through the Earth.
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- Strangeness
noun 1. the quality or condition of being strange. 2. Physics. a quantum number assigned the value −1 for one kind of quark, +1 for its antiquark, and 0 for all other quarks; the strangeness of a hadron is the sum of the values for the strangeness of its constituent quarks and antiquarks. Symbol: S. […]
- Strange-particle
noun, Physics. 1. any elementary particle with a strangeness quantum number other than zero. strange particle 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.
- Strange-quark
noun, Physics. 1. a quark having electric charge −1/3 times the elementary charge and strangeness −1; it is more massive than the up and down quarks. strange quark A quark with an electric charge of -1/3 and a mass of 391 electron masses, greater than that of the up quark and down quark, but smaller […]
- Stranger
noun 1. a person with whom one has had no personal acquaintance: He is a perfect stranger to me. 2. a newcomer in a place or locality: a stranger in town. 3. an outsider: They want no strangers in on the club meetings. 4. a person who is unacquainted with or unaccustomed to something (usually […]
- Stranger-rape
noun 1. sexual assault by an assailant upon a person he or she does not know.