The Collaborative International Dictionary of English v.0.48:

Angel \An"gel\, n. [AS. [ae]ngel, engel, influenced by OF.
   angele, angle, F. ange. Both the AS. and the OF. words are
   from L. angelus, Gr. 'a`ggelos messenger, a messenger of God,
   an angel.]
   1. A messenger. [R.]
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            The dear good angel of the Spring,
            The nightingale.                      --B. Jonson.
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   2. A spiritual, celestial being, superior to man in power and
      intelligence. In the Scriptures the angels appear as God's
      messengers.
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            O, welcome, pure-eyed Faith, white-handed Hope,
            Thou hovering angel, girt with golden wings.
                                                  --Milton.
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   3. One of a class of "fallen angels;" an evil spirit; as, the
      devil and his angels.
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   4. A minister or pastor of a church, as in the Seven Asiatic
      churches. [Archaic]
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            Unto the angel of the church of Ephesus write.
                                                  --Rev. ii. 1.
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   5. Attendant spirit; genius; demon. --Shak.
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   6. An appellation given to a person supposed to be of angelic
      goodness or loveliness; a darling.
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            When pain and anguish wring the brow,
            A ministering angel thou.             --Sir W.
                                                  Scott.
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   7. (Numis.) An ancient gold coin of England, bearing the
      figure of the archangel Michael. It varied in value from
      6s. 8d. to 10s. --Amer. Cyc.
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   Note: Angel is sometimes used adjectively; as, angel grace;
         angel whiteness.
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   Angel bed, a bed without posts.

   Angel fish. (Zool.)
      (a) A species of shark (Squatina angelus) from six to
          eight feet long, found on the coasts of Europe and
          North America. It takes its name from its pectoral
          fins, which are very large and extend horizontally
          like wings when spread.
      (b) One of several species of compressed, bright colored
          fishes warm seas, belonging to the family
          Ch[ae]todontid[ae].

   Angel gold, standard gold. [Obs.] --Fuller.

   Angel shark. See Angel fish.

   Angel shot (Mil.), a kind of chain shot.

   Angel water, a perfumed liquid made at first chiefly from
      angelica; afterwards containing rose, myrtle, and
      orange-flower waters, with ambergris, etc. [Obs.]
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WordNet (r) 3.0 (2006):

angel shark
    n 1: sharks with broad flat bodies and winglike pectoral fins
         but that swim the way sharks do [syn: angel shark,
         angelfish, Squatina squatina, monkfish]