Source : Webster's Revised Unabridged Dictionary (1913)

Corpus \Cor"pus\ (-p[u^]s), n.; pl. {Corpora} (-p[-o]*r[.a]).
   [L.]
   A body, living or dead; the corporeal substance of a thing.

   {Corpus callosum} (k[a^]l*l[=o]"s[u^]m); pl. {Corpora
      callosa} (-s?) [NL., callous body] (Anat.), the great band
      of commissural fibers uniting the cerebral hemispheres.
      See {Brain}.

   {Corpus Christi} (kr[i^]s"t[imac]) [L., body of Christ] (R.
      C. Ch.), a festival in honor of the eucharist, observed on
      the Thursday after Trinity Sunday.

   {Corpus Christi cloth}. Same as {Pyx cloth}, under {Pyx}.

   {Corpus delicti} (d[-e]*l[i^]k"t[imac]) [L., the body of the
      crime] (Law), the substantial and fundamental fact of the
      comission of a crime; the proofs essential to establish a
      crime.

   {Corpus luteum} (l[=u]"t[-e]*[u^]m); pl. {Corpora lutea}
      (-[.a]). [NL., luteous body] (Anat.), the reddish yellow
      mass which fills a ruptured Graafian follicle in the
      mammalian ovary.

   {Corpus striatum} (str[-i]*[=a]"t[u^]m); pl. {Corpora
      striata} (-t[.a]). [NL., striate body] (Anat.), a ridge in
      the wall of each lateral ventricle of the brain.

Source : WordNet®

corpus delicti
     n : the body of evidence that constitute the offence; the
         objective proof that a crime has been committed
         (sometimes mistakenly thought to refer to the body of a
         homicide victim)