The quality, state, or degree of being dilute; the measure of how thin or weak a solution or substance is.
Formed from the adjective 'dilute' plus the productive noun-forming suffix '-ness.' This creates an abstract noun describing the inherent quality of being dilute, from Latin 'diluere.'
Chemists rely on measuring 'diluteness' constantly, but they usually call it 'concentration'—it's fascinating how the same idea has both an old-fashioned literary word and a modern technical one.
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