1. Concerned with or providing correction
   "a correctional institution"

See also: correction, punitive, punitory

• class Charophyceae
• class Chilopoda
• class Chlorophyceae
• class Chondrichthyes
• class Chrysophyceae
• class Chytridiomycetes
• class Ciliata
• class Ciliophora
• class Coniferopsida
• class Crinoidea
• class Crustacea
• class Cryptophyceae
• class Cyanobacteria
• class Cyanophyceae
• class Cycadopsida
• class Cyclosporeae
• class Deuteromycetes
• class Diatomophyceae
• class Dicotyledonae
• class Dicotyledones
• class Diplopoda
• class Echinoidea
• class Equisetatae
• class Euglenophyceae
• class Eumycetes