Octactine is a synthetic term with the prefix "octa-" meaning "eight" and the suffix "-actine" indicating a muscle protein, specifically one that aids in the contraction or movement of muscle fibers. The pronunciation of Octactine is defined as /ɑːktæktɪn/ according to the International Phonetic Alphabet (IPA). The spelling of Octactine is therefore derived from the phonetic transcription of its separate syllables, with each letter representing a unique sound in the word's pronunciation.