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。