Zygotoblast is a biological term that refers to the first stage of development after fertilization. The spelling of this word can be explained using the International Phonetic Alphabet (IPA) transcription. The word begins with the consonant cluster /zg/, which is pronounced as a voiced fricative followed by a voiced velar plosive. The vowels are pronounced as a long /o/ and a short /a/, followed by a consonant cluster of /t/ and /b/, which is pronounced as a plosive and a voiced bilabial fricative, respectively. The word concludes with the final consonant /t/.
Sporozoite.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.