D defs.my
Entry 3 senses Webster, 1913

Nicety

/nīs'-ĭt-ē/ · Ni·ce·ty · IPA /ˈnaɪsɪti/
01 n. The quality or state of being nice (in any of the senses of that word.).
pl. Niceties ((#))
  1. 1.
    The quality or state of being nice (in any of the senses of that word.).
    “The miller smiled of her nicety.” Chaucer.
  2. 2.
    Delicacy or exactness of perception; minuteness of observation or of discrimination; precision.
  3. 3.
    A delicate expression, act, mode of treatment, distinction, or the like; a minute distinction.
    “The fineness and niceties of words.” Locke.
Phrases & compounds
To a nicety — with great exactness or accuracy.