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Webster 1913 Edition

Adj.

[Pref.

in-

not +

concocted

Imperfectly digested, matured, or ripened.

[Obs.]

Bacon.

Adj.

[in and concoct.]

Not fully digested; not matured; unripened.

inconcocted ‎(comparative more inconcocted, superlative most inconcocted)

(obsolete) Imperfectly digested, matured, or ripened.
(Can we find and add a quotation of Francis Bacon to this entry?)