IN MATH: 1. unit of length in the metric system; literally 1 thousandth of a meter (symbol mm).
IN ENGLISH: 1. as defined above.
See:

See: 
APPLICATION: (see list 110)
Complete: 
1. 1 mm = __ m; 
2. 1 km = __ mm; 
3. 40 mm = ___ cm 
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