socle
Concise Oxford English Dictionary © 2008 Oxford University Press:
socle /ˈsəʊk(ə)l, ˈsɒk-/
▶noun Architecture a plain low block or plinth supporting a column, statue, etc. or as the foundation of a wall.
– origin C18: from Fr., from Ital. zoccolo, lit. ‘wooden shoe’, from L. socculus, from soccus (see sock).
'socle' also found in these Oxford entries:

