crawlspace

or crawl space

[ krawl-speys ]
/ ˈkrɔlˌspeɪs /

noun

(in a building) an area accessible by crawling, having a clearance less than human height, for access to plumbing or wiring, storage, etc.

Origin of crawlspace

First recorded in 1950–55; crawl1 + space
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019