octagonoctagon /ˈɑktəˌgɑn/ noun [countable] 
math, geometry a flat shape with eight sides—octagonal /ɑkˈtægənl/ adjective: an octagonal room
math, geometry a flat shape with eight sides—octagonal /ɑkˈtægənl/ adjective: an octagonal room- Carson, Kit
- Carson, Rachel
- cart
- carte blanche
- cartel
- Carter, James (Jimmy)
- Cartesian coordinate
- carthorse
- Cartier-Bresson, Henri
- Cartier, Jacques
- cartilage
- cartload
- cartographer
- cartography
- carton
- cartoon
- cartoonish
- cartoonist
- cartridge
- cartwheel
- carve
- carver
- Carver, George Washington
- carving
- carving fork