Candle is a unit of luminous intensity.
Carat
(Units Package Symbol) Carat is a unit of weight.
Cental is a unit of weight.
Century is a unit of time.
Cicero is a unit of length.
Cord
(Units Package Symbol) Cord is a unit of volume.
Cubit
(Units Package Symbol) Cubit is a unit of length.
Curie
(Units Package Symbol) Curie is a unit of radioactivity.
Dalton is a unit of mass.
Decade is a unit of time.