Transparency \Trans*par"en*cy\, n.; pl. Transparencies. [Cf. F. transparence.]

1. The quality or condition of being transparent; transparence.

2. That which is transparent; especially, a picture painted on thin cloth or glass, or impressed on porcelain, or the like, to be viewed by natural or artificial light, which shines through it. --Fairholt.

Source: Webster's Revised Unabridged Dictionary (1913)