sur·plice 
(sûrplĭs)
(sûrplĭs)n.
A loose-fitting, white ecclesiastical gown with wide sleeves, worn over a cassock.
adj.
Designating a garment with a V-shaped neckline in which fabric from one side of the garment diagonally overlaps fabric from the other side before being sown together.
[Middle English surplis, from Anglo-Norman surpliz, variant of Old French sourpeliz, from Medieval Latin superpellīcium : Latin super-, super- + Medieval Latin pellīcium, fur coat (from Latin, neuter of pellīcius, made of skin, from pellis, skin; see pel-3 in the Appendix of Indo-European roots).]
surplice