regeneration The growth of new tissues or organs to replace those lost or damaged by injury. Many plants can regenerate a complete plant from a shoot segment or a single leaf, this being the basis of many horticultural propagation methods (see cutting). The capacity for regeneration in animals is less marked. Some planarians and sponges can regenerate whole organisms from small pieces, and crustaceans (e.g. crabs), echinoderms (e.g. brittlestars), and some reptiles and amphibians can grow new limbs or tails (see autotomy), but in mammals regeneration is largely restricted to wound healing.

Regeneration ★★ 1915

Irish hoodlum Owen (Fellowes) is saved from his life of crime by social worker Mamie Rose (Nilsson). Walsh filmed on location in New York's Bowery district and used actual gangsters in roles. Also features the 10-minute 1910 short “The Police Force of New York City,” produced by Thomas Edison. 72m/B VHS, DVD . Rockliffe Fellowes, Anna Q. Nilsson; D: Raoul Walsh; W: Raoul Walsh, Carl Harbaugh; C: Georges Benoit. Natl. Film Reg. '00.

regeneration Biological term for the ability of an organism to replace one of its parts if it is lost. An example is a lizard that can regrow a tail after the original one becomes detached. Regeneration also refers to a form of asexual reproduction in which a new individual grows from a detached portion of a parent organism.

regeneration. The securing of the repair and conservation of older structures to ensure their future viability.

regeneration (ri-jen-er-ay-shŏn) n. the natural regrowth of a tissue or other part lost through injury.