counion

co- +‎ union

counion (plural counions)

1. (mathematics) The join or union of all sets that meet a specified condition.
   • 1986, Yves Diers, Categories of Boolean sheaves of simple algebras:

     the left adjoint […] preserves direct factors, their cointersections, their complements and thus their counions

2. (used attributively) Others in a trade union.
   • 1977, McKee Fisk, Norbert J. Mietus, Applied Business Law:

     After weeks of fruitless negotiations, Bollinger and his counion members went out on strike, demanding a pay boost.

3. (Christianity) Communion.
   • 2015, Rhonda Ambrose, Beyond the Door, →ISBN:

     Counion with Him is His desire, not a robotic family who is programmed or shows up out of duty or obligation.

4. The act or result of joining or merging; union.
   • 2001, Hans-Dirk van Hoogstraten, Deep Economy: Caring for Ecology, Humanity and Religion, →ISBN, page 62:

     Yet this crucial break did not become an environmental threat until the counion of science and technology in the nineteenth century.