Natural phenomena, such as a rainbow, have no scientific names. However, the mnemonic "Roy G. Biv" is often used to easily remember the colors of a rainbow.
A scientific name is a unique taxonomic designation used to identify living organisms through a standard system called binomial nomenclature. This method provides a clear channel for scientific experts from all over the world to exchange information concerning a particular species.
A rainbow is a non-living entity that becomes visible in the sky when atmospheric conditions are suitable and the observer is at the right position. This optical display is due to the refractive and reflective properties of light. The acronym Roy G. Biv stands for the sequence of hues in a rainbow. These colors are red, orange, yellow, green, blue, indigo and violet.