The correct spelling of "Arthrobid" is "arthropod." This term refers to a classification of invertebrate animals that have jointed legs, such as insects, spiders, and crustaceans. The IPA phonetic transcription for this word is /ˈɑːθrəpɒd/. It features two syllables and includes the "th" sound followed by the "r" sound. This spelling ensures proper communication and understanding in scientific and academic contexts that require precise terminology.