avuncular [uh-VUHNG-kyuh-ler]
adjective
-of, pertaining to, or characteristic of an uncle
1: of or relating to an uncle
2: suggestive of an uncle especially in kindliness or geniality
http://dictionary.reference.com/browse/avuncularhttp://www.merriam-webster.com/dictionary/avuncular My sister thought my older gentleman friend Rutherford looked smitten with me, but I swore that his regard was merely avuncular.