The Collaborative International Dictionary of English v.0.48:

alkalic \alkalic\ adj.
   1. having the properties of an alkali. Opposite of acidic.

   Note: when used of aqueous solutions, it signifies that the
         solution has a pH greater than 7.

   Syn: alkaline (vs. acidic), basic
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

alkalic
    adj 1: relating to or containing an alkali; having a pH greater
           than 7; "alkaline soils derived from chalk or limestone"
           [syn: alkaline, alkalic] [ant: acidic,
           amphiprotic, amphoteric]