Avuncular

[ə'vʌŋkjʊlə] or [ə'vʌŋkjəlɚ]

(adj.) being or relating to an uncle .

(adj.) resembling a uncle in kindness or indulgence .

Edited by Helen--From WordNet

(a.) Of or pertaining to an uncle.

Inputed by Bernard

adj. pertaining to an uncle.—v.t. or v.i. Avunc′ulise (Fuller) to act like an uncle.

Inputed by Harvey