Duodenum - duodenum, twelve; so named because it is 12 fingerbreadths in length.⏎
Fossa - fossa, trench or ditch, hence any concavity.⏎
Cricoid - krikos, ring.⏎
Cuboid - kubos, cube; eidos, resembling.⏎
Epigastric - epi, upon; gaster, stomach; originally used to designate the area of the abdomen overlying the stomach.⏎