wordodex

n. The part of the human brain responsible for storage and, more importantly, retrieval of the words learned over the course of a lifetime.

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Wordodex failures, in which the correct or perfect word (le mot juste ou parfait), which may have spent years collecting dust in the less-travelled areas of a surgeon's cerebral cortex, is badly routed and ends up dangling uselessly at the tip of his tongue, can be both annihilatory and devastative.