Arborization ( Cajal, 1888 ) : Short form of terminal arborization (Cajal, 1888).

Spine ( Cajal, 1888 ) : Short form of dendritic spine (Cajal, 1899), or somatic spine; p. 4, "espinas" in Spanish. It may of course also refer to the spinal (vertebral) column.

Terminal arborization ( Cajal, 1888 ) : Abundant branching at the end of an axon trunk or axon collateral (Cajal, 1899), typically with abundant axon terminals (Barker, 1899) and axon varicosities; used by Cajal (1888, p. 10) for Golgi material of bird cerebellum (Aristotle); also see Strong & Elwyn (1925, p. 173). Synonym is telodendria in its modern sense.