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What is the difference between atom and substituent?

atom | substituent |

As nouns the difference between atom and substituent

is that atom is the smallest medieval unit of time, equal to fifteen ninety-fourths of a second while substituent is any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed.

atom

English

(wikipedia atom)

Alternative forms

* atomus (obsolete)

Noun

(en noun)
  • (history of science) A hypothetical particle posited by Greek philosophers as an ultimate and indivisible component of matter.
  • (physics, chemistry) The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
  • * {{quote-magazine, year=2013, month=September-October, author= Katie L. Burke
    • , magazine=(American Scientist), title= In the News , passage=Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:
  • A mote of dust in a sunbeam.
  • The smallest, indivisible constituent part or unit of something. (Now generally interpreted as a figurative use of the physics sense, above.)
  • * 1835 , Sir , Sir (James Clark Ross), Narrative of a Second Voyage in Search of a North-west Passage …'', Volume 1 , pp.284-5
    • Towards the following morning, the thermometer fell to 5°; and at daylight, there was not an atom of water to be seen in any direction.
  • A very small amount (of something immaterial); a whit.
  • * 1873 , (Isabella Macdonald Alden) (as "Pansy"), Three People , Western Tract and Book Society (1873), page 325:
    • "I have hardly the faintest atom of hope," answered this honest, earnest man.
  • *
    • those of us who are capable of it are forced to work to the last atom of our strength
  • (mathematics) A non-zero member of a (Boolean algebra) that is not a union of any other elements.
  • (computing, programming, Lisp) An individual number or symbol, as opposed to a list. A scalar value.

    • Synonyms

    * See also * (small amount) see also .

    Related terms

    * atom smasher * atomic * atomize

    See also

    * element

    References

    * archived version of Wikipedia page "Atom (disambiguation)"

    Anagrams

    * * * * * ----

    substituent

    English

    Noun

    (en noun)
  • (chemistry) any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed
  • (grammar) pro-form