1) Development 2) Growing 3) Growth 4) Maturation 5) Ontogenesis 6) Ontogeny 
Neurogenesis (birth of neurons) is the process by which neurons are generated from neural stem cells and progenitor cells. Most active during pre-natal development, neurogenesis is responsible for populating the growing brain with neurons. Recently, neurogenesis was shown to continue in two parts of the brains of adult mammals: the hippocampus and...
production or generation of nerves
The production and growth of new nerve cells during development and, in select brain regions, throughout life.
<embryology> Differentiation of the nervous system from the ectoderm of the early embryo. There are major differences between neurogenesis in vertebrates and invertebrates. ... (18 Nov 1997) ... 
(noor″o-jen´ә-sis) the development of nerve tissue.
The production of new nervous tissue.
Differentiation of the nervous system from the ectoderm of the early embryo. There are major differences between neurogenesis in vertebrates and invertebrates.
Type: Term Pronunciation: nū′rō-jen′ĕ-sis Definitions: 1. Formation of the nervous system or formation of neurons within the adult brain.
Neurogenesis: The process by which new nerve cells are generated. In neurogenesis, there is active production of new neurons, astrocytes, glia, and other neural lineages from undifferentiated neural progenitor or stem cells. Neurogenesis is considered a rather inactive process in most areas of the adult brain.
[n] - the development of nerve tissues
noun the development of nerve tissues