Lewis & Short

2. cōnexus (conn-), ūs, m. [conecto], a joining together, combination, connection (several times in Lucr., elsewh. rare), Lucr. 3, 556; Vitr. 10, 1, 5.
In plur., Lucr. 1, 634; 2, 726; 2, 1020; 5, 443.