The British spelling variant of dialysis; the process of separating substances by passing them through a semipermeable membrane.
From 'dialyse' (British spelling of 'dialyze') + '-ation' (suffix forming abstract nouns). The British convention uses '-isation' where American English uses '-ization,' creating parallel terms for the same medical process.
Medical terminology shows fascinating British-American splits—'dialysation' versus 'dialysis' in British English mirrors 'realisation' versus 'realization,' a difference rooted in 18th-century spelling reforms that the Atlantic never fully agreed on.
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