pumice. n. 1. (Geological Science) Also called: pumice stone a light porous acid volcanic rock having the composition of rhyolite, used for scouring and, in powdered form, as an abrasive and for polishing. vb. 2. (Tools) (tr) to rub or polish with pumice.[C15 pomys, from Old French pomis, from Latin pÅ«mex ].umÂ·ice. n. A light, porous, glassy lava, used in solid form as an abrasive and in powdered form as a polish and an abrasive. tr.v. pumÂ·iced, pumÂ·icÂ·ing, pumÂ·icÂ·es. To clean, polish, or smooth with pumice.
Summary: 1.A neuron is an individual cell, whereas, a group of neurons form a nerve. 2.There are two types of neurons ââ sensory and motor neurons; while there are three types of nerves ââ afferent, efferent and mixed nerves.
Neuron is the main cell of the Nervous System. It is an electrical excitable cell that is responsible for the transmision of the nerve impulse. With it, they process (in the brain, ganglia and spinal cord) and transmit information. A human brain has 100.000 millions of neurons. It is very similar to other body cells, except for the difference that neurons do not replicate. 2  Axon: it is the longest and most important part of the neuron, it transmit the impulse. 3  A neuron has one only axon.