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The Collaborative International Dictionary
Exacuate

Exacuate \Ex*ac"u*ate\, v. t. [L. exacure; ex out (intens.) + acuere to make sharp.] To whet or sharpen. [Obs.]
--B. Jonson. -- Ex*ac`u*a"tion, n. [Obs.] [1913 Webster] ||

Wiktionary
exacuate

vb. (context obsolete English) To whet or sharpen.