Doric order, Entasis.
Meaning (entasis): In the Greek Doric Order from Paestum the shafts are much smaller at the tops than the bases, and the entasis is very obvious.
Meaning (order): In Classical architecture the elements making up the essential expression of a columnar..
[shafts of columns have a greater diameter at the bottom than the top]
Curl, James Stevens. Oxford Dictionary of Architecture and Landscape Architecture. Oxford: Oxford University Press, 2006. 265, 540. Print.