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The Collaborative International Dictionary
Extill

Extill \Ex*till"\, v. i. [imp. & p. p. Extilled; p. pr. & vb. n. Extilling.] [L. extillare, exstillare; ex out + stillare to drop, stilla drop.] To drop or distill. [Obs.]
--Johnson.

Wiktionary
extill

vb. (context obsolete transitive English) To drop or distill.