Requiem
n
1 (R.C. Church) a Mass celebrated for the dead
2 a musical setting of this Mass
3 any piece of music composed or performed as a memorial to a dead person or persons (C14: from Latin requies rest, from the opening of the introit, Requiem aeternam dona eis Rest eternal grant unto them)
requiem shark
n any shark of the family Carcharhinidae, occurring mostly in tropical seas and characterized by a nictitating membrane and a heterocercal tail. The family includes the tiger shark and the soupfin
(C17: French requiem probably assimilated from a native name)