What does bismuth mean?
Bismuth is a chemical element, number 51 on the periodic table, represented by the symbol Bi. It is a heavy, brittle metal with a silvery-white appearance that often carries a delicate pinkish tinge. Long mistaken for lead because of its density and similar properties, bismuth was eventually recognized as a distinct element in the eighteenth century. Today it is prized for several unusual qualities: it has one of the lowest melting points of any metal, it expands slightly as it solidifies, and its compounds are remarkably non-toxic compared with neighboring heavy elements. These traits make it useful in fusible alloys for fire-safety devices, in pharmaceuticals such as bismuth subsalicylate (the active ingredient in well-known stomach remedies), and in cosmetics and pigments. In its pure form it forms striking iridescent hopper-shaped crystals beloved by collectors. The word is used almost exclusively in scientific, medical, and industrial contexts, making it a specialized but genuinely useful addition to a technically minded vocabulary.
nounA brittle, silvery-white metallic chemical element with atomic number 51 and symbol Bi, having a pinkish tinge and used chiefly in alloys, pharmaceuticals, and pigments.
- The chemical element bismuth (symbol Bi, atomic number 51), a heavy, brittle, pink-tinged silvery metal used in alloys, medicines such as bismuth subsalicylate, low-melting-point alloys, and pigments.
"The pharmacist recommended an antacid containing bismuth to settle her stomach."
"Pepto-Bismol's active ingredient is bismuth subsalicylate, which soothes upset stomachs."
"Because of its unusually low melting point, bismuth is often alloyed with tin and lead in fusible metals used for fire sprinklers."
Rarely used; 'bismuth' is normally uncountable as a substance. A plural appears only when referring to individual specimens or isotopic varieties.
"The museum's mineral case displayed several striking bismuths grown under laboratory conditions."
Bismuth crystals grow in stunning rainbow-hued staircase shapes — but those colors aren't paint; they're thin oxide layers bending light on the metal's surface.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bismuth
The word 'bismuth' entered English in the seventeenth century from New Latin 'bisemutum', a Latinization coined by the German mineralogist Georgius Agricola, who adapted it from the German word 'Wismut'. The ultimate origin of 'Wismut' itself is uncertain, though it may derive from German roots relating to a meadow ('Wiese') or a place-name combined with a reference to mines. Because of this murky German vernacular origin rather than a classical Latin or Greek root, English has few if any true etymological relatives of 'bismuth'.
How bismuth is actually used
A technical/scientific term used mainly in chemistry, metallurgy, medicine, and geology; uncountable when referring to the substance generally, though it can take a plural form when referring to samples or isotopes. It carries a neutral connotation and appears mostly in formal or specialist registers.