An inhomogeneous medium, containing small spheres of varying size, in which the path of a light ray follows a Lévy flight

plural of magnifying glass

plural of Glasgow smile

Alternative form of rose-colored glasses

Britain standard spelling of rose-colored glasses.

(idiomatic) An optimistic perception of something; a positive opinion; seeing something in a positive way, often thinking of it as better than it actually is.

water gauge

A pair of binoculars for observing "in the field". / A small monocular refracting telescope. / The larger of the image lenses of an optical device.

(physics) The temperature below which an amorphous material is a glassy solid and above which it is a viscous liquid

plural of glass ceiling