superfine

[soo-per-fahyn] /ˌsu pərˈfaɪn/
adjective
1.
extra fine, as in grain or texture; unusually fine:
superfine sugar.
2.
extra fine in quality.
3.
excessively refined; overnice:
superfine manners.
Origin
1400-50; late Middle English; see super-, fine1
British Dictionary definitions for superfine

superfine

/ˌsuːpəˈfaɪn/
adjective
1.
of exceptional fineness or quality
2.
excessively refined
Derived Forms
superfineness, noun