Source : Webster's Revised Unabridged Dictionary (1913)

Isagelous \I*sag"e*lous\ ([imac]*s[a^]g"[e^]*l[u^]s), a. [Is- +
   Gr. a`gelos information.]
   Containing the same information; as, isagelous sentences.
   ``The coded message and the original, though appearing
   entirely unlike, are completely isagelous.'' --Bacon ``The
   complementary strands have isagelous sequences.'' --J. D.
   Watson.