U·ca·ya·li 
(′kä-yälē)
(′kä-yälē) A river of eastern Peru flowing about 1,610 km (1,000 mi) northward to join the Marañón River and form the Amazon River.
- perchloric acid
- perchlorid
- perchloride
- perchlorobenzene
- perchloroethylene
- perciatelli
- percipience
- percipiency
- percipient
- Percival
- Percocet
- Percodan
- percolate
- percolation
- percolator
- per contra
- percurrent
- percuss
- percussion
- percussion cap
- percussion instrument
- percussionist
- percussive
- percussively
- percussiveness