Noun
(physics) A proposed form of matter that includes strange quarks in addition to the usual up and down quarks of nuclear matter. Equivalently, a proposed very stable form of matter that protons and neutrons might decay into; matter composed of strangelets.
Used other than figuratively or idiomatically: see strange, matter.
Source: en.wiktionary.orgStrange matter main Strange matter is a type of quark matter that may exist inside some neutron stars close to the Tolman–Oppenheimer–Volkoff limit (approximately 2–3 solar masses ). Source: Internet