คำว่า ' ultramarine ' ( N )
มีความหมายในภาษาไทยว่า สีฟ้าเข้ม
คำนิยามในภาษาอังกฤษ (definition) :
[a.] Situated or being beyond the sea.
[n.] A blue pigment formerly obtained by powdering lapis lazuli, but now produced in large quantities by fusing together silica, alumina, soda, and sulphur, thus forming a glass, colored blue by the sodium polysulphides made in the fusion. Also used adjectively.