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 ef="module.php?name=Lexikon&file=search&eid=1&query=ITU-T">ITU-Tef="module.php?name=Lexikon&file=search&eid=1&query=standards">standards, 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)