"Heteralius" is spelled with 4 syllables: /hɛ.tə.ˈreɪ.li.əs/. The first syllable is pronounced "het" with a short "e" sound, followed by a schwa sound in the second syllable "uh". The stress falls on the third syllable "re" pronounced with a long "ay" sound. The final syllable "lius" is pronounced with a short "i" sound, followed by the schwa sound and then a soft "s" sound. The spelling of this word follows typical English spelling patterns, with the letter "h" representing the "h" sound, the letter "t" representing the "t" sound, and so on.
A twin monster in which the parasite is so undeveloped as to be scarcely recognizable as such, and to exist as little more than an excrescence on the ventral surface of the autosite.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.