consŏcĭātĭo

I. a union, association (several times in Cic.; elsewhere rare): consociatio hominum atque communitas, Cic. Off. 1, 44, 157; cf. id. ib. 1, 28, 100; 1, 41, 149: gentis, Liv. 40, 5, 10: sinistra siderum, Firm. 6, 12 fin.