An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

Occupying the same area in space or happening at the same time. Of two geometric figures, matching point for point.

From Fr. coincident, from M.L. coincident-, coincidens, pr.p. of coincidere, → coincide.

→ coincide.

1) An instance of something happening; an event or occurrence.
2a) Likely or apt to happen.
2b) Falling or striking on something, as light rays or a beam of particles.

→ incidence.

Fotân, agent noun and adj. from fotâdan, → incidence.

The → light ray that strikes a surface before → reflection, → refraction, or → absorption. Opposite of → emergent ray.

→ incident; → ray.