1. Photograph of a microscopic object 
2. A microscopically small photograph of a picture, writing, printed page, etc

Derived forms: microphotographs

• collar cell
• collarbone
• collard
• collard greens
• collards
• collared lizard
• collared peccary
• collared pika
• collarless
• collate
• collateral
• collateral damage
• collateral fraud
• collateralise
• collateralize
• collaterally
• collation
• collator
• colleague
• collect
• collect call
• collectable
• collectanea
• collected
• collectedly