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

Derived forms: microphotographs

• biotech
• biotechnological
• biotechnology
• bioterrorism
• biotic
• biotic community
• biotin
• biotite
• biotitic
• biotope
• biotype
• biotypic
• biovular
• bioweapon
• biparous
• bipartisan
• bipartite
• bipartizan
• biped
• bipedal
• bipedalism
• biphenyl
• bipinnate
• bipinnate leaf
• bipinnatifid