The Collaborative International Dictionary of English v.0.48:

Micrometric \Mi`cro*met"ric\, Micrometrical \Mi`cro*met"ric*al\,
   a. [Cf. F. microm['e]trique.]
   Belonging to micrometry; made by the micrometer. --
   Mi`cro*met"ric*al*ly, adv.
   [1913 Webster]