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lanthanum
Lanthanum is primarily discussed within the context of inorganic chemistry and materials science. It is rarely encountered in general conversation, appearing almost exclusively in technical specifications, academic papers, or industrial catalogs regarding optics and metallurgy.
As a chemical element, it is treated as an uncountable mass noun. It refers to the substance in general rather than individual atoms or discrete objects, meaning it does not take a plural form in standard scientific usage.
Meanings
Examples
The chemist added a small amount of lanthanum to the alloy.
Lanthanum carbonate is used to treat high phosphate levels in patients with kidney failure.
Wait, is lanthanum the first element in the lanthanide series?
High refractive index glass often contains lanthanum oxide.
I wonder if lanthanum is difficult to extract from ore.
The lab report indicates a high concentration of lanthanum in the sample.
Lanthanum serves as an effective catalyst in various chemical reactions.