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Means the end of nothingness and the genesis of knowledge(Nihil=nothing anth=end. latin).
The last boss in half life one was named so.
also a "quiz festival" in india that involves all of indias main reserch, business, and other development related institutes.
"are you going to the nihilanth?"
"have you beaten nihilanth yet?"
"I have learnt math! It's my nihilanth so to say..."
by Mikoteh1st August 28, 2004
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