Zetta- 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 zetta. It was formed from the Greek (), also meaning "seven". "Hepta" never received official sanction and is obsolete. Zeta (), although
Tera Fort Lakhpatji (ruled 1741-1760). Sumraji Thakore of Tera, the chief of Tera Estate, spoke badly of the Rao of Kutch. Lakhpatji sent an army to Tera, to subdue the revolt. For the first time in history of Kutch, artillery power was used in war. This artillery was set up by the famous Ram Singh Malam. The cannon power destroyed most of the fort. The war ended after three months of siege, when Sumraji surrendered and gave a formal apology for his remarks. The walls of fort was damaged in 1819 Rann of Kutch earthquake which were repaired later. The fort is