The Collaborative International Dictionary
Atomicity \At`o*mic"i*ty\, n. [Cf. F. atomicit['e].] (Chem.) Degree of atomic attraction; equivalence; valence; also (a later use) the number of atoms in an elementary molecule. See Valence.
Wiktionary
n. 1 (context uncountable English) The quality or state of being atomic—of being indivisible. 2 (context chemistry English) The number of atoms in a molecule. 3 (context computing English) The state of a system (often a database system) in which either all stages complete or none complete.
Wikipedia
In database systems, atomicity (or atomicness; from Greek atomos, undividable) is one of the ACID transaction properties. An atomic transaction is an indivisible and irreducible series of database operations such that either all occur, or nothing occurs. A guarantee of atomicity prevents updates to the database occurring only partially, which can cause greater problems than rejecting the whole series outright. As a consequence, the transaction cannot be observed to be in progress by another database client. At one moment in time, it has not yet happened, and at the next it has already occurred in whole (or nothing happened if the transaction was cancelled in progress).
Example of atomic transaction is a monetary transfer from bank account A to account B. It consists of two operations, withdrawing the money from account A and saving it to account B. Performing these operations in an atomic transaction ensures that the database remains in a consistent state, that is, money is not lost nor created if either of those two operations fail.
Atomicity may refer to:
Usage examples of "atomicity".
I remember that once we deliberately went off for a walk in a park, chatting loudly so that adults would hear us, decorating our talk with all sorts of difficult scientific words whose meaning we did not know, such as transcendental, subjective, objective, synthetic, atomicity, parameter, evolutionism, precession of equinoxes, thermodynamic etc.