aÂ·pexÂ·iÂ·fiÂ·caÂ·tion. Induced tooth root development or closure of the root apex by hard tissue deposition. apexification. a process of promoting apical closure of the root in an endodontically treated tooth by placement of calcium hydroxide paste or other tissue-tolerant material in the root canal after an apicoectomy.
Supernumerary is an adjective which means exceeding the usual number. When used as a noun, supernumerary means a temporary employee, additional society member, or extra manpower, usually in a function which has a temporary contract. In aeronautical context, a flight deck may contain a supernumerary seat. 2  This is a place for someone who doesn't have anything to do with the take off, flying, or landing of the aircraft. 3  Just a place for an extra body to observe.
A percentage of shareholders, usually 67% to 90%. A supermajority is often required for a company to take certain actions, such as amending the charter. Some companies require supermajorities as anti-takeover measures. For example, a company may require two-thirds of shareholders to approve of a merger or acquisition.