The word "ceratine" is spelled with a C followed by the letters E-R-A-T-I-N-E. The pronunciation of this word can be written in the International Phonetic Alphabet as /sɛrətaɪn/. The first syllable is pronounced with an "eh" sound, followed by "rə" for the second syllable. The "tai" in the third syllable is pronounced with a long "i" sound, and the final syllable is pronounced with an "een" sound. "Ceratine" is a term used in biology to describe a specific substance found in the horns and hooves of some animals.