pipe·stone 
(pīpstōn′)
(pīpstōn′)n.
A heat-hardened, compacted, red or pink clay stone used by Native American peoples for making tobacco pipes.
- external capsule
- external-combustion engine
- external ear
- externalism
- externalist
- externality
- externalization
- externalize
- externally
- external phase
- external respiration
- externe
- externship
- exteroceptive
- exteroceptor
- exterritorial
- exterritoriality
- exterritorially
- extinct
- extinction
- extinctive
- extinguish
- Wilhelm I
- Wilhelm II
- Wilhelmina