1) Chemical compound 2) Compound 
In chemistry aluminate is a compound containing an oxyanion of aluminium, such as sodium aluminate. In the naming of inorganic compounds it is a suffix that indicates a polyatomic anion with a central aluminum atom. ==Aluminate oxyanions== Aluminum oxide is amphoteric: it dissolves in both bases and acids. When dissolved in bases it forms hydroxoa...
• (n.) A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen.
A·lu`mi·nate noun (Chemistry) A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen. 
[n] - a compound of alumina and a metallic oxide
aluminate A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen.
noun a compound of alumina and a metallic oxide
a salt of the acid form of aluminum hydroxide, containing the group AlO or AlO.