The correct spelling for the Latin phrase "Ater succus" is /ˈɑtɛr ˈsʊkəs/. "Ater" means "black" while "succus" means "juice". The pronunciation of "Ater" is /ˈɑtɛr/ and it is pronounced as it is spelled. However, the pronunciation of "succus" is a bit tricky. It is pronounced as /ˈsʊkəs/ with the first syllable being stressed. The "cc" is pronounced as a single "k". This word is commonly used in botany to describe dark-colored plant juices.