Embryothiast is a rare medical term used to describe the presence of blood in a developing embryo. Spelling of this word can be broken down using IPA phonetic transcription as /ɛmbrɪoθiəst/. The word starts with the phoneme /ɛ/, followed by /m/ and then /b/. This is followed by the vowel sound /rɪ/ and then the consonant cluster /oθ/. Finally, the word ends with the vowel sound /iəst/. Embryothiast is derived from the Greek words "embryo" meaning unborn child and "thiastos" meaning bloody.