The word "Neossology" is a medical term used to describe the study of new diseases. It is spelled with five syllables: ne-o-sol-o-gy. The first syllable "ne" is pronounced as "nee," while the second syllable "o" is pronounced as "oh." The third syllable "so" is pronounced as "soh," followed by the fourth syllable "lo" pronounced as "loh." Finally, the fifth syllable "gy" is pronounced as "jee." The unique spelling and pronunciation of this word make it a valuable term in the medical community.