1) Compound of element number 24 2) Salt 
• (n.) A salt of chromic acid.
A salt of chromic acid. ... Sodium chromate Cr 51, anionic hexavalent radioactive chromium in the form of sodium chromate (Na251CrO4) with a half-life of 27.8 days; used for the determination of circulating red cell volume and red cell survival time. ... (05 Mar 2000) ... 
(kro´māt) any salt of chromic acid.
a compound in which chromium has a valence of 6. Chromate may be added to drilling fluids either directly or as a constituent of chrome lignites or chrome lignosulfonates. In certain areas, chromate is widely used as a corrosion inhibitor, often in conjunction with lime. 
Chro'mate noun [ Confer French chromate . See Chrome .] (Chemistry) A salt of chromic acid. 
Type: Term Pronunciation: krō′māt Definitions: 1. A salt of chromic acid.
[n] - any salt or ester of chromic acid
noun any salt or ester of chromic acid
a salt of chromic acid, as potassium chromate, KCrO.