a. Anthrop. [f. mod.L. syndyasmus, ad. Gr. συνδυασμός coupling, pairing, sexual intercourse, f. συνδυάζειν, f. σύν SYN- + δυάζειν to couple, f. δύο TWO: see -IAN.] Pertaining to or marked by sexual union without exclusive coition or with temporary cohabitation.
1877. L. H. Morgan, Ancient Society, III. i. 384. The Syndyasinian or Pairing Family … was founded upon marriage between single pairs, but without an exclusive cohabitation.
