[al-kuh-lahyn, -lin]
adjective Chemistry.
of or like an alkali.
containing an alkali.
having the properties of an alkali.
having a pH value greater than 7. Compare acid ( def 5c ).

1670–80; alkal(i) + -ine1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To alkaline
World English Dictionary
alkaline (ˈælkəˌlaɪn)
having the properties of or containing an alkali

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

1670s, from Mod.L. alcalinus (from alkali) + chemical suffix -ine. Of soils, attested from 1850.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

alkaline al·ka·line (āl'kə-lĭn, -līn')

  1. Of, relating to, or containing an alkali.

  2. Having a pH greater than 7.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
alkaline   (āl'kə-lĭn, -līn')  Pronunciation Key 
  1. Capable of neutralizing an acid. Bases are alkaline.

  2. Relating to an alkali compound.

  3. Having a pH greater than 7.

  4. Having a relatively low concentration of hydrogen ions.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
He washed the map for four days in an alkaline bath that removed acid and
  grime, and he cut away the linen backing.
With their blood more alkaline than usual, mountaineers can grow dizzy or
The problem is that current electrolyzer technology takes a lot of energy in a
  harsh, alkaline environment.
Bilirubin levels increase after alkaline phosphatase rises.
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature