[f. prec. + -ATE.] A compound in which alumina acts the part of an acid; a compound of alumina with one of the stronger bases. Watts.
1841. Trimmer, Pract. Geol., 68. They have therefore by some chemists been named aluminates.
1869. Phillips, Vesuv., x. 286. Aluminates are equally limited.
1873. Fownes, Chem., 372. Spinell is an aluminate of magnesium.