S> Nearly SynchroniSed, a term deScribing a communication SyStem where tranSmitted SignalS have the Same nominal digital rate but are SynchroniSed on different clockS. According to ITU-TStandardS, correSponding SignalS are pleSiochronouS if their Significant inStantS occur at nominally the Same rate, with any variation in rate being conStrained within Specified limitS. [Pronunciation? /pleS' ee-oh-kroh' nuS/?] (1995-03-02)