polttopinta

== Finnish == === Etymology === poltto +‎ pinta === Pronunciation === IPA(key): /ˈpoltːoˌpintɑ/, [ˈpo̞l̪t̪ːo̞ˌpin̪t̪ɑ̝] Rhymes: -intɑ Syllabification(key): polt‧to‧pin‧ta Hyphenation(key): poltto‧pinta === Noun === polttopinta (optics) caustic (envelope of reflected or refracted rays) Synonym: kaustiikka a burned or scorched surface, e.g. on wood ==== Declension ====