Definify.com

Webster 1913 Edition

Noun.

One who limits, or restrains.

[Obs.]

An overprecise person; one rigidly or ceremoniously exact in the observance of rules; a formalist; – formerly applied to the English Puritans.

The most dissolute cavaliers stood aghast at the dissoluteness of the emancipated

precisian

Macaulay.

Noun.

s as z. One that limits or restrains.

One who is rigidly or ceremoniously exact in the observance of rules.

precisian ‎(plural precisians)

A religious purist; a Puritan.
Someone who strictly observes the rules; a pedant or stickler.
- 1891, Mary Noailles Murfree, In the "Stranger Poeple's" Country, Nebraska 2005, p. 47:
  Her speech was hardly more grating upon him, precisian though he was, than the careless, untutored lapses of a child might have been; all the senses of comparison as readily ignored them.
- 1911, Max Beerbohm, Zuleika Dobson:
  “A sister of mine will be there,” explained the one, knowing the Duke to be a precisian.