Meaning of Airy disc in English:
Airy disc
noun
(also Airy's disc)
Mathematics Physics The circular diffraction pattern formed when plane light waves pass through a point aperture; the bright central region of this.
Origin
1920s; earliest use found in Transactions Optical Society. Described by Airy in Trans. Cambr. Philos. Soc 5 285.
Are You Learning English? Here Are Our Top English Tips