Something transparent; specif., a piece of transparent or translucent material, esp. a positive film or slide, having a picture or design that is visible when light shines through it or that can be projected on a screen.
In shallow seas the transparency is always reduced in rough weather.
If the aether were itself constituted of discrete molecules, on the model of material bodies, such transparency would not be conceivable.
His work won him the Rumford medal of the Royal Society in 1838, and in 1843 he received its Royal medal for a paper on the "Transparency of the Atmosphere and the Laws of Extinction of the Sun's Rays passing through it."
There is a distinct relationship between colour and transparency in the ocean; the most transparent water which is the most free from plankton is always the purest blue, while an increasing turbidity is usually associated with an increasing tint of green.
The dressed sheets are sorted according to size, transparency, colour and freedom from spots or stains.