Niggling

• (p. pr. & vb. n.) of Niggle • (p. pr. & vb. n.) of Niggle • (n.) Finicky or pottering work; • (n.) minute and very careful workmanship in drawing, painting, or the like, esp. when bestowed on unimportant detail.
Found on http://thinkexist.com/dictionary/meaning/niggling/

Niggling

Nig'gling noun Finicky or pottering work; specif. (Fine Arts) , minute and very careful workmanship in drawing, painting, or the like, esp. when bestowed on unimportant detail.
Found on http://www.encyclo.co.uk/webster/N/21
No exact match found