|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a scrap or morsel of food left at a meal.|
"Þou most know þat subtraccion is drawynge of one nowmber oute of anoþer nomber." ["The Crafte of Nombrynge," c.1425]
|subtraction (səb-trāk'shən) Pronunciation Key
The operation of finding the difference between two numbers or quantities.