Anthracion is a rare word that is commonly misspelled due to its unusual pronunciation. The correct spelling of this word is A-n-t-h-r-a-c-i-o-n. The IPA phonetic transcription explains that the "th" sound is pronounced as a voiceless dental fricative, the "c" sound as a voiceless palatal fricative, and the "i" as a short "ih" sound. Anthracion is a term used in chemistry to refer to a crystalline compound derived from coal tar, and it is important to spell it correctly for accuracy in scientific research.