The Collaborative International Dictionary of English v.0.48:

Precisian \Pre*ci"sian\, n.
   1. One who limits, or restrains. [Obs.]
      [1913 Webster]

   2. An overprecise person; one rigidly or ceremoniously exact
      in the observance of rules; a formalist; -- formerly
      applied to the English Puritans.
      [1913 Webster]

            The most dissolute cavaliers stood aghast at the
            dissoluteness of the emancipated precisian.
                                                  --Macaulay.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "precisian":
   Babbitt, Middle American, Philistine, anal character, bluestocking,
   bourgeois, burgher, captious critic, compulsive character,
   conformer, conformist, conventionalist, elegant, euphemistic,
   euphuistic, exact, exquisite, formalist, formalistic,
   goody good-good, goody-goody, methodical, methodologist,
   meticulous, middle-class type, mincing, model child, namby-pamby,
   nitpicker, orderly, organization man, overnice, overprecise,
   overrefined, parrot, pedant, pedantic, perfectionist,
   plastic person, precieuse, precieux, precious, precise,
   precisianist, precisianistic, precisionist, precisionistic,
   punctilious, purist, puristic, scrupulous, sheep, simpering,
   square, stickler, teenybopper, traditionalist, trimmer, yes-man