Millimetre

The exchange unfolding in front of my eyes had not a single millimetre of a gap in which for me to slip.

A millimetre is a thousandth of a metre.

Holonyms: centimetre < decimetre < metre < kilometre < megametre < gigametre < terametre < petametre

Meronyms: picometre < nanometre < micrometre

It is not permissible to use abbreviations for unit symbols or unit names, such as sec (for either s or second), sq. mm (for either mm² or square millimetre), cc (for either cm³ or cubic centimetre), or mps (for either m/s or metre per second).