The Collaborative International Dictionary of English v.0.48:
Pariah \Pa"ri*ah\, n. [From Tamil paraiyan, pl. paraiyar, one of
the low caste, fr. parai a large drum, because they beat the
drums at certain festivals.]
1. One of an aboriginal people of Southern India, regarded by
the four castes of the Hindus as of very low grade. They
are usually the serfs of the Sudra agriculturalists. See
Caste. --Balfour (Cyc. of India).
2. An outcast; one despised by society.
Pariah dog (Zool.), a mongrel race of half-wild dogs which
act as scavengers in Oriental cities.
Pariah kite (Zool.), a species of kite (Milvus govinda)
which acts as a scavenger in India.