scotia
noun
sco·tia ˈskō-sh(ē-)ə 
-tē-ə
: a concave molding used especially in classical architecture in the bases of columns
Example Sentences
Recent Examples on the Web Rela adapted the design of baroque scotias on the posts of a park outside to fashion a large whorl over the front entrance. 
Elisabeth Malkin, ELLE Decor, 20 Feb. 2018
Elisabeth Malkin, ELLE Decor, 20 Feb. 2018 Word History
Etymology
Latin, from Greek skotia, from feminine of skotios dark, shadowy, from skotos darkness — more at shade
First Known Use
1563, in the meaning defined above