häiriöteoria

== Finnish == === Etymology === häiriö +‎ teoria === Pronunciation === IPA(key): /ˈhæi̯riøˌteoriɑ/, [ˈhæi̯riø̞ˌt̪e̞o̞ˌriɑ̝] Rhymes: -iɑ Syllabification(key): häi‧ri‧ö‧te‧o‧ri‧a Hyphenation(key): häi‧riö‧teo‧ria === Noun === häiriöteoria (quantum mechanics) perturbation theory ==== Declension ====