olemus
(1) otseses tähenduses: eri materjalide vastastikune keemiline, bioloogiline vm kahjulik ülekandumine
= the unintentional transfer of material or microorganisms from one substance to another, with harmful effect
https://foodsafepal.com/cross-contamination/
(2) ülekantult : eri asitõendite (näiteks andmestike) elementide segunemine
= the unintentional mixing of elements of data or other evidence
https://biomedres.us/pdfs/BJSTR.MS.ID.009223.pdf