sem·i·dome 
(sĕmē-dōm′, sĕmī-)
(sĕmē-dōm′, sĕmī-)n.
A roof covering a semicircular space; half a dome.
semi·domed′ (-dōmd′) adj.
semidomeCourtyard of the Pinecone
Vatican City
- offline
- off-line
- offload
- off message
- off of
- off-off-Broadway
- off of gourd
- off of head
- off of one's gourd
- off of one's head
- off of plumb
- off (one's) guard
- off one's guard
- off (one's) hands
- off one's hands
- off (one's) rocker
- off one's rocker
- off/out of (one's) gourd
- off/out of (one's) head
- off/out of plumb
- off-peak
- off-piste
- off-price
- offprint
- off-putting