A thin sheet or strip of flexible material,such as a cellulose derivative or a thermoplastic resin,coated with a photosensitive emulsion and used to make photographic negatives or transparencies.

• 胶片，一种柔软物质的薄片，例如赛璐珞制品或热塑性树脂，涂有感光乳剂并用来制像片底片或幻灯片。