The Collaborative International Dictionary of English v.0.48:

Ankh \Ankh\, n. [Egypt.] (Egypt. Arch[ae]ol.)
   1. A tau cross with a loop at the top, used as an attribute
      or sacred emblem, symbolizing generation or enduring life.
      Called also crux ansata.
      [Webster 1913 Suppl.]

   2. an amulet or piece of jewelry shaped like an ankh[1].
      [PJC.]