catacaustic

== English == === Etymology === From cata- + caustic. === Pronunciation === (UK) IPA(key): /ˌkætəˈkɔːstɪk/, /ˌkætəˈkɒstɪk/ (General American, cot–caught merger) IPA(key): /ˌkætəˈkɑstɪk/ Rhymes: -ɔːstɪk === Noun === catacaustic (plural catacaustics) a caustic curve formed by light reflecting from a curved surface (mathematics) the envelope of all rays that emanate from a specified point (the radiant point) and reflect from a given curve; the evolute of the orthotomic ==== Derived terms ====