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Webster 1913 Edition

Noun.

[L.

parergon

, Gr. [GREEK];

παρά

beside + [GREEK] work.]

Something unimportant, incidental, or superfluous.

[Obs.]

Sir T. Browne.

Noun.

[Gr. beyond, and work.] Something unimportant, or done by the by. [Not used.]

parergy ‎(plural parergies)

(obsolete) Something unimportant, incidental, or superfluous.
(Can we find and add a quotation of Sir Thomas Browne to this entry?)