Zetta- the 6th letter of the modern and classical Greek alphabet, denotes a value of seven (7) when used as a numeral. Examples: Zetta- Zetta is a decimal unit prefix in the metric system denoting a factor of 10 or . The prefix was added as an SI prefix to the International System of Units (SI) in 1991 and has the symbol Z. Zetta is evocative of the Latin numeral , meaning "seven". Therefore it was used to denote the seventh power of 1000. A prefix of the same value, "hepta", was informally introduced a few years before the promulgation of
Tera language mid and low tone. Tone is not indicated orthographically since no minimal trios exist; minimal pairs can be distinguished by context. The first publication in Tera was "Labar Mbarkandu nu Yohanna Bula Ki", a translation of the Gospel of John, which established an orthographic system. In 2004, this orthographic system was revised. Tera language Tera is a Chadic dialect cluster spoken in north-eastern Nigeria in the north and eastern parts of Gombe State and Borno State. Blench (2006) believes Pidlimdi (Hinna) dialect is a separate language. Vowel length contrasts are neutralized in monosyllabic words with no coda consonants. All vowels