subceiling
1 of 2adjective
sub·ceil·ing ˌsəb-ˈsē-liŋ 
variants or sub-ceiling
: being or occurring at a level below a ceiling (such as a price ceiling)
subceiling prices
… is responsible for securing subceiling discounts on outpatient drug purchases … 
American Pharmacists Association
American Pharmacists Associationsubceiling
2 of 2noun
variants or sub-ceiling
plural subceilings or sub-ceilings
: a ceiling that is below a higher ceiling
Parts of the subceiling had water damage.
Another option for entertaining is the fully finished two-car garage, which includes a sub-ceiling to hide the door mechanisms and a kitchenette for catering. Elaine Goodman
Elaine Goodman
Word History
First Known Use
Adjective
1910, in the meaning defined above
Noun
1875, in the meaning defined above