Rhodalline is a chemical compound used in the manufacture of dyes. Its spelling can be explained using the International Phonetic Alphabet (IPA) as /ˌroʊdəˈlaɪn/. The first syllable "roh" is pronounced with an "o" sound followed by an "h" sound, while the second syllable "da" is spoken with a "d" sound then an "a" sound. Finally, the last syllable "lyne" is pronounced with a long "i" sound followed by an "n" sound with a silent "e". Correct spelling of such technical terms is essential in scientific fields.
Thiosinamine.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "rhodalline" does not seem to have a widely recognized etymology. It is possible that "rhodalline" is a specialized term or a specific variant of a word used in a specific field or context. Without further information about the word and its usage, it is challenging to determine its exact origin or etymology.