INCIDENCES
Noun
incidences
plural of incidence
Usage notes
• Since incidence is typically a mass noun, this plural form should be fairly rare. Usually incidents is what's intended.
Source: Wiktionary
INCIDENCE
In"ci*dence, n. Etym: [Cf. F. incidence.]
1. A falling on or upon; an incident; an event. [Obs.] Bp. Hall.
2. (Physics)
Definition: The direction in which a body, or a ray of light or heat, falls
on any surface.
In equal incidences there is a considerable inequality of
refractions. Sir I. Newton.
Angle of incidence, the angle which a ray of light, or the line of
incidence of a body, falling on any surface, makes with a
perpendicular to that surface; also formerly, the complement of this
angle.
– Line of incidence, the line in the direction of which a surface
is struck by a body, ray of light, and the like.
Source: Webster’s Unabridged Dictionary 1913 Edition