Here's why:
* Tone Languages: Tone languages are those where the pitch of a syllable can change the meaning of a word. Different tones are typically described as "high", "low", "rising", "falling", etc.
* Level Tones: Level tones are those where the pitch of a syllable remains relatively constant throughout its duration. They are often contrasted with contour tones, which have a distinct pitch change during the syllable.
It's possible that "terraced level tone" is a variation on "terrace tone," which is a term used in some descriptions of tone languages. Terrace tones, however, are not level tones; they involve pitch changes within the syllable, creating a terraced or stepped effect.
To better understand the specific term you are looking for, please provide more context. For example:
* What language are you studying?
* What is the source of the term?
* What is the specific linguistic phenomenon being described?
With more information, I can help you understand the term and its meaning in the context of linguistics.