chrononn.

1933 Isis 20 206 The idea was formulated by Robert Lévy, who obtained for the value of the Time-atom, which he calls ‘Chronon’, the number Θ = 4.5 × 10 ⁻²⁴ seconds.

1950 H. Margenau Nature of Physical Reality vii. 156 In recent times, the degree of indulgence in speculations about discrete ‘hodons’ and ‘chronons’ on the part of physicists has been an index of the failures of their theories.

1961 G. J. Whitrow Nat. Philos. Time v. 254 Dirac's..argument for this was the intriguing fact that the number of chronons..contained in T₀..is about order 10³⁹.

1974 U. K. Le Guin Dispossessed (1975) viii. 200 The chronon being thus the everted viscera of the quantum.

1988 J. F. Bennett Events & their Names x. lix. 157 Let a ‘stretched event’ be one that lasts for more than a chronon (if time is granular) and for more than an instant (if time is continuous).

1995 Found. Physics 25 1088 The idea of chronons.., in the absence of experimental indications or theoretical principles supporting this idea,..has not taken root in contemporary physics.