Having been made abnormal or altered to deviate from a normal or expected state; made atypical.
Past participle of abnormalise (British spelling). The adjective indicates that something has undergone the process of becoming abnormal.
In medical research, scientists often study 'abnormalised' cell cultures to understand disease—they deliberately make healthy cells abnormal to see what goes wrong, which paradoxically teaches us more about health than studying healthy cells directly!
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