Definition of atom. 1  1a : the smallest particle of an element that can exist either alone or in combination an atom of hydrogenb : the atom considered as a source of vast potential constructive or destructive energy â¦ a largely forgotten legacy of this country's conquest of the atom.
The mountain, a part of the Cascade Range, is a volcano that has not erupted for 2,000 years. It is also the highest mountain in the state of Washington. English explorer George Vancouver named Mount Rainier in honor of another navigator, Peter Rainier. Some people, however, prefer to call the mountain by its Indian name, Mount Tacoma.
How Did Mount Everest Get Its Name? The highest mountain in the World, Mount Everest in Nepal was named after and in honour of Sir George Everest who was a British Surveyor General. In 1852 he found it to be the highest peak in the World during the Great Survey of India. It was originally called Mont Everest.