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2 definitions found
 for Alkaline
From The Collaborative International Dictionary of English v.0.48 :

  Alkaline \Al"ka*line\ (?; 277), a. [Cf. F. alcalin.]
     Of or pertaining to an alkali or to alkalies; having the
     properties of an alkali.
     [1913 Webster]
  
     Alkaline earths, certain substances, as lime, baryta,
        strontia, and magnesia, possessing some of the qualities
        of alkalies.
  
     Alkaline metals, potassium, sodium, c[ae]sium, lithium,
        rubidium.
  
     Alkaline reaction, a reaction indicating alkalinity, as by
        the action on limits, turmeric, etc.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  alkaline
      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]

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