A drawing or sketch (often in pencil or charcoal) made from observation; used as a foundational practice in art education or as a preparatory study for artworks.
美術の授業で石膏像のデッサンを練習した。
In art class we practiced drawing plaster casts.
彼はデッサンがとても上手で、人物の骨格を正確に描ける。
He is very good at drawing—he can accurately depict a person's bone structure.
まずは軽くデッサンしてから色を塗ろう。
Let's do a light sketch first and then paint.