microscope

noun

mi·​cro·​scope ˈmī-krə-ˌskōp 

1

: an optical instrument consisting of a lens or combination of lenses for making enlarged images of minute objects

especially : compound microscope

2

: a non-optical instrument (such as one using radiations other than light or using vibrations) for making enlarged images of minute objects

an acoustic microscope

Examples of microscope in a Sentence

Students viewed the crystals through a microscope.

Recent Examples on the Web

Eastern Forest Tick Examined under a microscope, this minuscule parasite bears an uncanny resemblance to your childhood bully, right down to its mullet and Van Halen T-shirt. —Jay Ruttenberg, New Yorker, 8 June 2026

North Carolina will be under the microscope as long as Bill Belichick roams the sidelines in Chapel Hill. —Antonio Morales, New York Times, 5 June 2026

Under the microscope, researchers saw that in fresh turmeric, much of the curcumin stayed trapped inside plant cells. —Anna Giorgi, Verywell Health, 4 June 2026

While Ono faced the public just days after being named UF’s preferred candidate, Bell has spent more than two weeks under the microscope as conservative activists, bloggers and political operatives sifted through his decade-long record in Alabama searching for evidence of ideological heresy. —Garrett Shanley, Miami Herald, 3 June 2026

Word History

Etymology

New Latin microscopium, from micr- + -scopium -scope

First Known Use

1648, in the meaning defined at sense 1

Phrases Containing microscope

• atomic force microscope
• compound microscope
• dark-field microscope
• dissecting microscope
• electron microscope
• phase-contrast microscope
• put under the microscope
• scanning electron microscope
• scanning tunneling microscope
• under a/the microscope

Rhymes for microscope

• antelope
• bronchoscope
• cantaloupe
• cystoscope
• endoscope
• envelope
• epitope
• gyroscope
• horoscope
• isotope
• misanthrope
• pericope

Kids Definition

microscope

noun

mi·​cro·​scope ˈmī-krə-ˌskōp 

1

: an optical instrument consisting of a lens or a combination of lenses for making enlarged or magnified images of minute objects

2

: an instrument using radiation other than light for making enlarged images of very small objects

Medical Definition

microscope

noun

mi·​cro·​scope ˈmī-krə-ˌskōp 

1

: an optical instrument consisting of a lens or combination of lenses for making enlarged images of minute objects

especially : compound microscope see light microscope, phase-contrast microscope, polarizing microscope, reflecting microscope, ultraviolet microscope

2

: an instrument using radiations other than light or using vibrations for making enlarged images of minute objects

an acoustic microscope

see electron microscope, scanning electron microscope, x-ray microscope