Sem Meaning in English
word
Definition
'Sem' is most commonly an abbreviation for 'Scanning Electron Microscope,' a powerful microscope that uses electrons to create detailed images of small objects. Occasionally, it appears as a rare prefix meaning 'without,' but this usage is uncommon.
Usage & Nuances
In technical and scientific writing, 'SEM' is almost always capitalized and refers to the instrument. The nontechnical prefix meaning 'without' is archaic and almost never used outside specialized contexts.
Example Sentences
The scientist used a SEM to examine the sample.
basic
A SEM gives very detailed images of tiny objects.
basic
Have you ever seen a picture taken with a SEM?
basic
Our lab just got a new SEM, so we're excited to start some new projects.
natural
With a SEM, you can actually see the individual grains of sand up close.
natural
If you want to analyze the surface of your sample in detail, a SEM is the best tool for the job.
natural