The word "arcocentrum" refers to a type of vertebral structure found in some animals. The proper spelling is /ɑːrkəʊˈsɛntrəm/. The first syllable is pronounced with the "ar" vowel sound, like in "car" or "star." The second syllable begins with the "k" sound, followed by the "o" vowel sound. The third syllable has the schwa sound, and the final syllable is pronounced with the "en" sound like "sent" and "trum" is pronounced as "traam." It can be a tricky word to spell and pronounce correctly, but with practice it becomes easier.