trans·par·en·cy 
(trăns-pârən-sē, -păr-)
(trăns-pârən-sē, -păr-)n. pl. trans·par·en·cies
1. also trans·par·ence (-pârəns, -păr-) The quality or state of being transparent.
2. A transparent object, especially a photographic slide that is viewed by light shining through it from behind or by projection.