[qua.si.pe.ri.od.ic] adj (ca. 1890): almost but not quite periodic; esp: periodic on a small scale but unpredictable at some larger scale -- qua.si.pe.ri.od.ic.i.ty n
QUASIPERIODIC
Meaning of QUASIPERIODIC in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012