Pectosic is a word that refers to a type of bacterial infection that affects the respiratory system. The word is spelled as /pɛkˈtɑːsɪk/ in IPA phonetic transcription. The "pec" sound is pronounced as in "pecan", while the "to" sound is pronounced as in "toe". The "sic" sound is pronounced as "sik". The word may not be a commonly used one, but it is important to understand its proper spelling and pronunciation for medical contexts.