Antonyms of adj alkaline

1 sense of alkaline

Sense 1
alkaline (vs. amphoteric) (vs. acidic), alkalic -- (relating to or containing an alkali; having a pH greater than 7; "alkaline soils derived from chalk or limestone")

amphoteric (vs. acidic) (vs. alkaline), amphiprotic -- (having characteristics of both an acid and a base and capable of reacting as either)
acidic (vs. alkaline) (vs. amphoteric) -- (being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7))
        => acid -- (having the characteristics of an acid; "an acid reaction")
        => acid-forming -- (yielding an acid in aqueous solution)

Similarity of adj alkaline

1 sense of alkaline

Sense 1
alkaline (vs. amphoteric) (vs. acidic), alkalic -- (relating to or containing an alkali; having a pH greater than 7; "alkaline soils derived from chalk or limestone")
       => alkalescent, alcalescent -- (tending to become alkaline; slightly alkaline)
       => basic -- (of or denoting or of the nature of or containing a base)
       => base-forming -- (yielding a base in aqueous solution)
       => saltlike -- (resembling a compound formed by replacing hydrogen in an acid by a metal)