n. Symbol Cd
A soft, bluish-white metallic element occurring primarily in zinc, copper, and lead ores, that is easily cut with a knife and is used in nickel-cadmium storage batteries, rustproof electroplating, nuclear reactor shields, solders, and in low-friction, fatigue-resistant alloys. Atomic number 48; atomic weight 112.41; melting point 321.1°C; boiling point 767°C; specific gravity 8.65; valence 2. See Periodic Table.
[Latin cadmīa, calamine (the ore of zinc from which cadmium was first extracted as an impurity) (from Greek kadmeia (gē), Theban (earth), from Kadmos, Cadmus; see CADMUS) + -IUM.]
cadmic (-mĭk) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.