The spelling of "redcoral" can be a bit confusing, as it is actually two words put together – "red" and "coral". The IPA phonetic transcription for "red" is /rɛd/ and for "coral" it is /ˈkɔrəl/. When combined, the pronunciation becomes /rɛdˈkɔrəl/. This word refers to a type of coral that has a reddish hue. If you come across this word while reading, don't be thrown off by the unique spelling – now you know how to pronounce it correctly.
A species of coral of a bright red colour.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "redcoral" does not have an established etymology as it is not a recognized English term or word. It appears to be a combination of the words "red" and "coral" - two distinct words referring to the color red and the marine invertebrate, respectively.