名詞 cd:

1. a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
   同義詞：cadmium, atomic number 48
2. the basic unit of luminous intensity adopted under the Systeme International d'Unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees Kelvin
   同義詞：candle, candela, standard candle
3. a debt instrument issued by a bank; usually pays interest
   同義詞：certificate of deposit
4. a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser
   同義詞：compact disk, compact disc

形容詞 cd:

1. being one hundred more than three hundred
   同義詞：four hundred, 400

1. The lines AB and CD intersect at E.
   直線AB與直線CD相交於E點。
2. The line AB intersects the line CD at E.
   直線AB與直線CD相交於E點。
3. AB and CD intersect at (the point) P.
   AB線和CD線在P點相交。

cd
abbr.（略語）
Candela.
Candela.