Connascence \Con*nas"cence\, Connascency \Con*nas"cen*cy\, n. [L. con- + nascentia birth, fr. nascens, p. pr. of nasci to be born.] 1. The common birth of two or more at the same tome; production of two or more together. --Johnson. [1913 Webster] 2. That which is born or produced with another. [1913 Webster] 3. The act of growing together. [Obs.] --Wiseman. [1913 Webster]