1) Cadmium mineral 2) Cadmium sulphide 3) Mineral 4) Ore of cadmium 
Greenockite is a rare cadmium bearing metal sulfide mineral consisting of cadmium sulfide (CdS) in crystalline form. Greenockite crystallizes in the hexagonal system. It occurs as massive encrustations and as hemimorphic six-sided pyramidal crystals which vary in color from a honey yellow through shades of red to brown. The Mohs hardness is 3 to 3...
• (n.) Native cadmium sulphide, a mineral occurring in yellow hexagonal crystals, also as an earthy incrustation.
cadmium sulfide (CdS), the only mineral containing an appreciable amount of cadmium. It forms coatings on sphalerite and other zinc minerals. It ...
Green'ock·ite noun [ Named after Lord Greenock .] (Min.) Native cadmium sulphide, a mineral occurring in yellow hexagonal crystals, also as an earthy incrustation. 
Greenockite, named after Lord Greenock, is the most common mineral containing cadmium but found in few places and usually as an earthy coating on zinc ores. The largest use of cadmium is for electroplating other metals to form chemical resistant coatings. It has the formulae CdS and a relative hardness of 4.
Cadmium sulfate
[n] - ore of cadmium
Mineral, main source of cadmium sulphide.