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Webster 1828 Edition

Noun.

[L., to be born.]

The common birth of two or more at the same time; production of two or more together.

A being born or produced with another.

The act of growing together, or at the same time.

connascence ‎(uncountable)

The birth of two or more things at the same time.
(Can we find and add a quotation of Johnson to this entry?)
The act of growing together.
(computing) A relationship between two or more elements of software in which changing one necessitates changing the others in order to maintain overall correctness.
(obsolete) That which is born or produced with another.
(obsolete) The act of growing together.
(Can we find and add a quotation of Wiseman to this entry?)

connascence in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1828
Chapter 8: Encapsulation and Connascence in What Every Programmer Should Know About Object Oriented Design, Meilir Page-Jones