Meanings
- not comparablemathematicsstable when resting on one of its faces
(b) What is the least dimension, if any, in which a simplex can be unistable? If the condition of uniform density of material is relaxed, then a simplex can be unistable in 3 dimensions.
1990, Murray S. Klamkin, Problems in Applied Mathematics: Selections from SIAM Review, Society for Industrial and Applied Mathematics, →ISBN, page 4782 more examples
24. Are there unistable polyhedra with less than 19 faces? / A unistable polyhedron is one which when made of material of uniform density, will rest in stable equilibrium on only one of its faces.
1970, Research Paper, page 22There are two basic types of amorphous materials—the unistable and the bistable. The unistable material is one in which there are no structural changes. […] The mechanisms for carrier control in the unistable materials are electronic.
1979, IEEE Computer Society, Exploding Technology, Responsible Growth: Digest of Papers, pages 158, 159
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unistable. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/unistable
“unistable.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/unistable. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “unistable,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/unistable.
Source: unistable on Wiktionary, CC BY-SA 4.0.