The word "Alcocalum" is not found in traditional dictionaries, yet it is a term used in chemistry. The IPA phonetic transcription of "Alcocalum" is /ælkəʊkəlʌm/. The first syllable is pronounced with the vowel sound as in "cat." The second syllable has the diphthong /əʊ/ as in "go." The third syllable has the reduced vowel sound /ə/ as in "sofa." The last syllable has the vowel sound as in "come." The spelling of Alcocalum may seem complex, but it is necessary to accurately communicate this term in scientific contexts.