Biology and Medicine. The formation of new tissue or cells; the natural replacement or repair of a lost or damaged part, organ, etc.; the…

Organogenesis; (also) †the study of this, as a branch of biology (obsolete).

Biology. The formation or development of an organ, esp. as marked by structural change; the manner in which this occurs. Now rare.

The differentiation or (ontogenetic or phylogenetic) development of an organ or organs. Cf. earlier organogeny, n.

The formation of blood vessels; (in later use) spec. the formation of blood vessels from existing ones, occurring during embryonic development and…

The regeneration or regrowth of a lost body part.

Regeneration of a severed or damaged nerve; (also) spontaneous regrowth or surgical provision of nerve in an area of tissue; reinnervation.

The regeneration of an organ or structure that is different from the one lost.

The replacement in a metamerically segmented animal, esp. in the course of regeneration, of a structure forming part of one segment by a structure…

the perfect regeneration of a lost member or part.

the regeneration of an organ or part similar to the one lost.

The formation of new blood vessels, esp. as a pathological process. Also as a count noun: an instance of this; a new vessel.