What is the etymology of synapse and dendrite?
What is the etymology of synapse and dendrite?
Understanding the origins of scientific terms often reveals how early anatomists visualized microscopic structures. The words synapse and dendrite both have deep roots in the ancient Greek language.
Etymology of Synapse
The word synapse comes from the Greek word synapsis, which means "a joining together" or "clasping." This is formed by combining:
- syn- (meaning "together" or "with")
- haptein (meaning "to fasten" or "to clasp")
It was coined in 1897 by the English physiologist Sir Michael Foster and his colleague Arthur Verrall, and suggested to the neuroscientist Charles Sherrington, who officially popularized it to describe the junction where nerve impulses are transmitted from one neuron to another.
Etymology of Dendrite
Unlike the junctional meaning of synapse, dendrite describes the physical appearance of a neuron's branching extensions. It derives from the Greek word dendrites, meaning "of or belonging to a tree," which comes from:
- dendron (meaning "tree")
The suffix -ite (from the Greek -ites) is used in mineralogy and biology to denote a substance or structure resembling something. Thus, a dendrite literally translates to "little tree-like structure," perfectly describing the treelike branching fibers that receive signals in the nervous system.