mass noun
1- a reddish-brown colour associated particularly with monochrome photographs of the 19th and early 20th centuries棕褐色。
1.1
- a brown pigment prepared from a black fluid secreted by cuttlefish, used in monochrome drawing and in watercolours乌贼墨颜料。
1.2
- count noun a drawing done with this pigment乌贼墨颜料画。
1.3
- a blackish fluid secreted by a cuttlefish as a defensive screen乌贼分泌的墨汁。
- of a reddish-brown colour棕褐色的：
old sepia photographs.
棕褐色的老照片。
词源
late Middle English (denoting a cuttlefish)： via Latin from Greek sēpia 'cuttlefish'. The current senses date from the early 19th cent.