The word "calci" might seem like it's missing a letter or two, but it's actually spelled correctly! The phonetic transcription for "calci" is /kælsi/, with the stress on the first syllable. This word is derived from the Latin word "calx" which means "lime" or "limestone". In English, "calci" is often used as a prefix to indicate the presence of calcium in a compound or substance. So, the next time you see "calci" spelling, you can confidently know that it's not a mistake!