say it: see-DEE
cd is a noun and adjective meaning "a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores". It carries 5 recorded senses.
a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
a debt instrument issued by a bank; usually pays interest
a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser
being one hundred more than three hundred
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for cd come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.