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1.
an 3-4 foot long sword, simular to a katana.
a nodachi(also odachi and no-dachi) usually had no compassion sword.
generaly the last weapon a samari would use,(first bow, then yari) but thanks mainly to anime and manga it was largely overglorifyed.
the nodachi has no mistical powers you adult swim freaks!
by jawsofboredem February 01, 2006
 
2.
A 4 foot long, incredibly curved sword of Asian decent. Hard to use, due to size, and weight, but can cut through many a material with little effort.
See Katana
"My Nodachi PWNED that old lady!"
by DJ Chronos November 16, 2003