connective

1. not comparableServing or tending to connect; connecting.

   Society is doomed to an ignominious death as soon as the connective tissue of institutions and the ossified material of officialdom with its rank growth of unyielding red tape and formalism begin to spread, choking, and strangling the free, personal life of the individual.

   1919, Boris Sidis, The Source and Aim of Human Progress

   Synonyms: syndetic

plural connectives

1. That which connects.
2. human sciencesA function that operates on truth values to give another truth value.

   Condition iii) ensures that the truth-rules for the sentential connectives and quantifiers are satisfied within one and the same valuation νₛ.

   2008 October 8, Holger Andreas, “Another Solution to the Problem of Theoretical Terms”, in Erkenntnis, volume 69, number 3, →DOI

3. grammarA word used to connect words, clauses and sentences, most commonly applied to conjunctions.
4. biologyThe tissue which connects the locules of an anthers together.
5. anatomyA connective tissue.