AVUNCULAR
avuncular
(adjective) being or relating to an uncle
avuncular
(adjective) resembling a uncle in kindness or indulgence
Source: WordNet® 3.1
Etymology
Adjective
avuncular (comparative more avuncular, superlative most avuncular)
In the manner of an uncle, pertaining to an uncle.
Synonyms: uncley, unclish
Coordinate terms: maternal, materteral, paternal
(by extension) Kind, genial, benevolent, or tolerant.
Synonyms: kind, benevolent
Source: Wiktionary
A*vun"cu*lar, a. Etym: [L. avunculus uncle.]
Definition: Of or pertaining to an uncle.
In these rare instances, the law of pedigree, whether direct or
avuncular, gives way. I. Taylor.
Source: Webster’s Unabridged Dictionary 1913 Edition