subbase

About 0.06 uses per million words.

Meaning

1. noun The lowest projecting part of a baseboard, a pedestal or a similar construct.
2. noun The lowest course in typical road, driveway, path or sports court construction, above which is the base course, and finally the surface course.
3. noun A certain subcollection of a topological space

Similar words

base baseboard plinth pedestal undersetting foundation underbed substruction basis bench table

Often followed by

and material is of for materials course or courses

Word family

subbases