The Collaborative International Dictionary of English v.0.48:

Chela \Che"la\, n.; pl. Chel[ae]. [NL., fr. Gr. chhlh` claw.]
   (Zool.)
   The pincherlike claw of Crustacea and Arachnida.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Chela \Che"la\, n. [Hind. ch[=e]la, orig., slave, fr. Skr.
   c[=e][.t]a, c[=e][.t]aka, slave, servant.]
   In India, a dependent person occupying a position between
   that of a servant or slave and a disciple; hence, a disciple
   or novice. -- Che"la*ship, n.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

chela
    n 1: a Hindu disciple of a swami
    2: a grasping structure on the limb of a crustacean or other
       arthropods [syn: claw, chela, nipper, pincer]