Resembling or containing alkali; having alkaline properties.
From alkali + -ous suffix (from Latin -osus, meaning 'full of' or 'characterized by'). An older or less common variant related to 'alkaline.'
The -ous suffix is an ancient way to create adjectives—'famous,' 'dangerous,' 'mysterious' all use it. 'Alkalous' is an older chemistry term that sounds almost poetic compared to the modern 'alkaline'!
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