cartop

[kahr-top]
Also car·top·pa·ble [kahr-top-uh-buh l] /ˈkɑrˌtɒp ə bəl/.

Origin of cartop

First recorded in 1945–50; car1 + top1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018