Bases of support
I believe the answer is:
plinths
(Other definitions for plinths that I've seen before include "Pedestals" , "Slabs forming supports for columns" , "bases" .)
I've seen this clue in The New York Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.