synchronistic, synchronistical

[SYNCHRONISM.] 1. Pertaining to synchronism; as, synchronistic tables. 2. Happening at the same time; synchronous, simultaneous. "The exact definition of three synchronistic events."Cooper: Monumental Hist. Egypt , p. 16. syn-chron-ist-ic-al-ly, adv. [Eng. synchronistical; -ly.] In a synchronistic manner; according to dates. "A chronological chart, synchronistic ally and ethnographically arranged." - Athenœum , Sept. 9, 1882. (Advt.) sỹń-chron-i-zā-tion, s . [Eng. synchroniz(e); -ation .] 1. The act of synchronizing. 2. The happening of events at the same time. sỹń -chron-ize, v. i. & t. [SYNCHRONISM.] A. In trans.: To concur in point of time; to happen at the same time. "All these synchronize with the six first trumpets."More: Myst. of Godline , p. 191. B. Trans.: To make to agree in time; to cause to indicate the same time as another; to regulate or control as a clock, by a standard timepiece, as the chief clock in an observatory.