This is the 6585th most frequent Swedish word.
micro
Microwave (informally).
In this sentence, the word 'micro' is used informally to refer to a microwave oven.
Jag lagade mat i micro igår kväll.
I cooked food in the microwave last night.
Here, 'micro' is used as an adjective describing a lesson that is very short or condensed.
Vill du ha en microlektion om ämnet?
Do you want a micro-lesson on the subject?
In this context, 'micro' is part of scientific terminology referring to processes or equipment related to microscopic scales.