The word "spheraster" is spelled with the phonetic transcription /ˈsfɛrəstər/. The first syllable is pronounced as "sfer" with a high front unrounded vowel /ɛ/ and the combination "ph" makes an "f" sound. The second syllable "a" is pronounced with a low front unrounded vowel /ə/. The stress falls on the first syllable. "Spheraster" is a botanical term referring to a spherical mass of cells produced by certain fungi. Being mindful of accurate spelling is important in any field, especially in highly specialized industries like botany.