Plural of aluminum; multiple samples, types, or forms of the metallic element aluminum (Al).
From alumin (Latin root) + -um (neuter ending) + -s (English plural). The element was named in English following Neo-Latin scientific naming conventions.
While aluminum itself is an element so you don't usually pluralize it, you might say 'aluminums' when discussing different alloys or industrial aluminum products—like 'we tested three different aluminums.'
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