{i} simultaneousness, coincidence, concurrence; study of things or events which take place during the same period of time; arrangement of historic events according to their dates
the relation that exists when things occur at the same time; "the drug produces an increased synchrony of the brain waves"
Pertaining to or having the quality of synchronicity. - synchronistical adjective (now rare or obsolete) = SYNCHRONISTIC - synchronistically adverb (a) in accordance with synchronism, synchronically; (b) synchronously