noun
Used in medical, laboratory, or technical contexts for a thin layer of material spread on a slide or surface. Also used in photography and art for a smudged or blurred effect.
血液のスミアーを顕微鏡で観察した。
I observed the blood smear under a microscope.
このレンズでは、画面の端にスミアーが発生しやすい。
With this lens, smear tends to occur at the edges of the image.