Latin word for the swerve of atoms, or an inclination/bias
Clinamen (/klaɪˈneɪmən/; plural clinamina, derived from clīnāre, to incline) is the Latin name Lucretius gave to the unpredictable swerve of atoms, in order to defend the atomistic doctrine of Epicurus. In modern English it has come more generally to mean an inclination or a bias.
Epicureanism
According to Lucretius, the unpredictable swerve occurs "at no fixed place or time":
When atoms move straight down through the void by their own weight, they deflect a bit in space at a quite uncertain time and in uncertain places, just enough that you could say that their motion has changed. But if they were not in the habit of swerving, they would all fall straight down through the depths of the void, like drops of rain, and no collision would occur, nor would any blow be produced among the atoms. In that case, nature would never have produced anything.[1]
This swerving, according to Lucretius, provides the "free will which living things throughout the world have".[2] Lucretius never gives the primary cause of the deflections.
Modern usage
In modern English clinamen is defined as an inclination or a bias. The OED gives its first recorded use in English by Jonathan Swift in his 1704 Tale of a Tub ix.166, satirizing the atomistic theory of Epicurus:
Epicurus modestly hoped that one time or other, a certain fortuitous concourse of all men's opinions—after perpetual justlings, the sharp with the smooth, the light and the heavy, the round and the square—would, by certain clinamina, unite in the notions of atoms and void, as these did in the originals of all things.[3]
The term was taken up by Harold Bloom to describe the inclinations of writers to "swerve" from the influence of their predecessors; it is the first of his "Ratios of Revision" as described in The Anxiety of Influence.[4]
^in "Theory of the Subject" (1982), trans. Bruno Bosteels; (New York: Continuum, 2009): ISBN978-0-8264-9673-7 (hardcover)
^ Louis Althusser, Philosophy of the Encounter: Later Writings, 1978-1987, trans. G.M. Goshgarian (London and New York: Verso, 2006): ISBN978-1844675531
^Cf. E. Tiezzi, N. Marchettini, ″Epistemological Aspects of Systems Theory Related to Biological Evolution″, in: Francisco Parra-Luna (Ed.), Systems Science and Cybernetics, Volume I, Encyclopaedia of Life Support Systems, EOLSS Publishers Co., Ltd., Oxford, UK, 2009, p. 264-286.