- base, alkali - any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides and hydroxides of metals and ammonia"
--1 is a kind of compound, chemical compound
--1 has particulars:pyridine; purine; purine; imidazole, iminazole, glyoxaline; melamine, cyanuramide; pyrimidine Derived forms: verb alkalize1, verb alkalify1 - alkali - a mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture
--2 is a kind of salt
Derived form: verb alkalify1