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.
The other type of cell is glia, which protects the former. Neurons have three main parts: 1  Cell body or Soma: it is the main part of the cell, the one that makes all metabolism and functions. 2  It is very similar to other body cells, except for the difference that neurons do not replicate.3  Axon: it is the longest and most important part of the neuron, it transmit the impulse. 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.