#1
caisson n. [
coffer, lacuna] an ornamental sunken panel in a ceiling or dome
. wn #2
caisson n. a two-wheeled military vehicle carrying artillery ammunition
. wn #3
caisson n. [
ammunition chest] a chest to hold ammunition
. wn #4
caisson n. [
pneumatic caisson, cofferdam] large watertight chamber used for construction under water
. wn