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Webster 1913 Edition

Noun.

[L.

implexio

Act of involving, or state of being involved; involution.

Noun.

[See Implicate.] The act of infolding or involving; the state of being involved; involution. [Little used.]

implexion ‎(plural implexions)

A relation between incomplete and complete objects which seems to be very close to what is often called “instantiation”, i.e., a relation between universals and particulars. Incomplete objects are “implected” in complete ones.

Mariah Reicher, "Nonexistent Objects," section 6.2, in The Stanford Encyclopedia of Philosophy (http://plato.stanford.edu/entries/nonexistent-objects/#TheForFurInv).