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.
Supergiants are a class of star that are among the most massive and luminous stars found. The Yerkes spectral classification place supergiants with the luminosity classes of 1a (luminous supergiants), 1ab (intermediate luminous supergiants), or 1b (less luminous supergiants).he largest and most luminous supergiants are termed hypergiants with a luminosity class of 0, although the term is loosely defined. Supergiants also vary greatly in their radius, ranging from 30 times the diameter of the sun to over 1000 times.