virus
Pronunciation
Noun
B1 Intermediate
Quick answer
A tiny infectious particle that can only reproduce by invading the cells of a living host.
Usage notes
In everyday use, 'virus' is often applied loosely to other pathogens or to computer malware, though the biological term is more specific.
Test yourself
Which word fits the gap? "A single _____ is far too small to see without a powerful microscope."
Answer: virus
In your own words, what does "virus" mean?
A tiny infectious particle that can only reproduce by invading the cells of a living host.
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