reintroduction

noun

1. The act of introducing something again.

   “On the passenger-carrying 1 ft. 11½ in.-gauge Vale of Rheidol branch from Aberystwyth to Devils Bridge, however, the 2-6-2 tank engines are to be named for the reintroduction of the train service for this summer on June 11.”

2. The release of animals from captivity into the wild, especially, into an area where they have become extirpated or greatly reduced.

   “Klopfer and Gamble (1966) gave 16 female goats (C. hircus) 5 min of contact with their young at parturition. Nine of the mothers had been temporarily rendered anosmic (could not smell) at parturition by spraying a 10% cocaine hydrogen chloride solution into their nostrils 20–90 min prior to parturition. […] Eight of the nine females who were anosmic at parturition but could smell at reintroduction accepted their own offspring, as well as alien young during reinstatement.”

   “The IUCN (International Union for the Conservation of Nature), for example, restricts use of the word ʽreintroductionʼ to species that have become extinct locally or Europe-wide no more than 200 to 300 years ago.”

   “A wildlife foundation called Elephant Havens, based at the edge of Botswana’s Okavango Delta, has developed a long-term reintroduction project.”

3. (countable)An animal so released.