The Collaborative International Dictionary of English v.0.48:

Sexton \Sex"ton\, n. [OE. sextein, contr. fr. sacristan.]
   An under officer of a church, whose business is to take care
   of the church building and the vessels, vestments, etc.,
   belonging to the church, to attend on the officiating
   clergyman, and to perform other duties pertaining to the
   church, such as to dig graves, ring the bell, etc.
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   Sexton beetle (Zool.), a burying beetle.
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The Collaborative International Dictionary of English v.0.48:

Necrophore \Nec"ro*phore\, n. [Gr. nekro`s a dead body + fe`rein
   to bear.] (Zool.)
   Any one of numerous species of beetles of the genus
   Necrophorus and allied genera; -- called also burying
   beetle, carrion beetle, sexton beetle.
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The Collaborative International Dictionary of English v.0.48:

Carrion \Car"ri*on\, a.
   Of or pertaining to dead and putrefying carcasses; feeding on
   carrion.
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         A prey for carrion kites.                --Shak.
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   Carrion beetle (Zool.), any beetle that feeds habitually on
      dead animals; -- also called sexton beetle and burying
      beetle. There are many kinds, belonging mostly to the
      family Silphid[ae].

   Carrion buzzard (Zool.), a South American bird of several
      species and genera (as Ibycter, Milvago, and
      Polyborus), which act as scavengers. See Caracara.

   Carrion crow, the common European crow (Corvus corone)
      which feeds on carrion, insects, fruits, and seeds.
      [1913 Webster]