atoll
atoll

atom


Definition: Meaning of, atom in English to English dictionary.

Pronunciation: / ˈatəm /

  • noun
  • synonym
  • antonym
Word Forms:
Singular Plural
atom atoms
[countable]
  1. the smallest part of an ELEMENT that can exist alone or can combine with other substances to form a MOLECULE
    SYNONYM
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    ANTONYM
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  2. a very small amount of something - used for emphasis
    SYNONYM
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    ANTONYM
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synonym
antonym

atom used in phrases

  • Rutherford atom (noun)
    1. equal to the atomic number first modern concept of atomic structure; all of the positive charge and most of the mass of the atom are contained in a compact nucleus; a number of electrons occupy the rest of the volume of the atom and neutralize the positive charge
  • atom bomb (noun)
    1. splitting the nuclei of a heavy element like uranium 235 or plutonium 239 a nuclear weapon in which enormous energy is released by nuclear fission
  • atom smasher (noun)
    1. a scientific instrument that increases the kinetic energy of charged particles
  • atom-bomb (verb)
    1. bomb with atomic weapons
  • carbon atom (noun)
    1. an atom of carbon
  • gram atom (noun)
    1. the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element
  • hydrogen atom (noun)
    1. an atom of hydrogen
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Pronunciation: ˈkɑːləʊz
Parts of Speech: noun
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