What does microscope mean?
A microscope is an instrument that makes extremely small objects or structures visible by magnifying them. Most familiar microscopes use glass lenses and light, while electron microscopes use beams of electrons to achieve much greater magnification. The word is common in science, medicine, biology, materials science, and education, where microscopes make microorganisms, cells, crystals, and fine surface details observable. It also has a figurative role: something placed “under the microscope” is subjected to intense scrutiny, as though every detail were being enlarged and inspected. In rare formal or dated usage, microscope can itself be a verb meaning to examine something minutely. Although the instrument is strongly associated with modern laboratories, its development helped transform medicine and biology by giving observers direct access to structures that had previously been invisible. Its name reflects this function: it is literally a device for viewing things that are small.
An instrument for viewing and magnifying very small objects or parts, using lenses or another method of magnification.
"The student focused the microscope on a prepared slide."
The unmodified singular form is commonly used attributively, as in “microscope slide” and “microscope lens.”
To examine or scrutinize something minutely, especially with a microscope.
"Investigators microscopied the samples for signs of contamination."
Rare, formal, or dated; “examine under a microscope” or “scrutinize closely” is more usual in modern English.
The standard plural adds -s; the unmodified singular is used before a noun when the instrument is modified, as in “electron microscope.”
"The laboratory purchased several new microscopes."
A microscope's name literally means “small viewer,” but its lenses have revealed entire worlds that the unaided eye can never see.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does microscope come from?
The word entered English in the early 17th century from New Latin microscopium, a form built from Greek mikros, meaning “small,” and skopein, meaning “to look” or “to inspect.” Its literal sense—a means of looking at small things—fits the compound microscopes then being developed to magnify objects too tiny for the naked eye. Related forms such as microscopic, microscopy, and microscopist preserve the same Greek elements.
Related word forms
How microscope is actually used
As a noun, microscope is common in scientific, medical, and educational contexts. Its use as a verb is rare and formal or dated; the more usual modern wording is “examine under a microscope” or “scrutinize closely.”
Easily confused with microscope
A microscope is an instrument used to magnify small objects, whereas microscopic is an adjective meaning extremely small or relating to things visible only under magnification.