motility vs. mobility

Bob bbruner at
Sun Jan 2 15:32:57 EST 2000

On Sun, 2 Jan 2000 21:16:27 +0100, "Fred Pruyn" <pruyn at> wrote:

>Who knows why the capability of moving of bacteria is called motility and
>not as usual mobility? Is there something special to their movement?


Motility is a narrower term. A book is mobile, but not motile. I
suspect that the microbiologists were more careful to use the term
motility (capable of moving -- on its own) since it is not obvious
that bacteria have motion systems.



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