The Collaborative International Dictionary of English v.0.48:

Reassemble \Re`as*sem"ble\, Re-assemble
\Re`-as*sem"ble\(r[=e]`[a^]s*s[e^]m"b'l), v. t. & i.
   To assemble again; -- usually after having taking something
   apart. Usually used without the hyphen.
   [1913 Webster WordNet 1.5]

WordNet (r) 3.0 (2006):

reassemble
    v 1: assemble once again, after taking something apart