Prefix with chemistry (3)

I think it could be either:

Which length description are you looking for?:

bio

'prefix with chemistry' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for bio that I've seen before include "Prefix or combining form meaning of living things" , "Life story (abbr)" , "life described in print" , "Prefix meaning life, of living things" , "Prefix denotes living things" .)

I've seen this clue in The New York Times.

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