from The Century Dictionary.
- noun The growing or bending of cell-masses, or of cells, toward or away from one another. See
Sorry, no etymologies found.
"(3) The faculty possessed by the capillary walls of being stimulated to sprout out and branch by increased functioning, _i. e._, by increased diffusion, and their power to exhibit a chemically conditioned cytotropism, which causes the sprouts to find one another and unite.