A particular extent of space or surface; the scope of a concept, operation, or activity.
The etymology is not clear; perhaps akin to L. arere "to be dry" → arid.
Pahné "area, field," from pahn "broad, wide" (Mid.Pers. pah(a)n, Av. pathana- "broad, wide, spacious," probably related to perethav- "broad, wide," Skt. prthav-, Gk. platus; PIE *plat- "to spread") + noun forming suffix -é.
Fr.: zone de cohérence
Of an electromagnetic wave, the area of a surface perpendicular to the direction of propagation, over which the electromagnetic wave maintains a specified degree of coherence.
Fr.: surface collectrice
Of an interferometric telescope made up of several mirrors, the hypothetical mirror created by the combination of the individual mirrors.
→ collect; → area.