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Webster 1828 Edition

adv.

In a derivative manner; by derivation.

derivatively ‎(comparative more derivatively, superlative most derivatively)

In a derivative fashion
- 1988 December 2, Tom Boeker, “A Christmas Dance for Johnnie Mae”, in Chicago Reader:
  The pleasures of food and sex are compared […] in much the same way, derivatively enough, that Bunny equates the two in John Guare's House of Blue Leaves.