pseudoperiodicadj.

1890 Cent. Dict. Pseudoperiodic, quasi-periodic.

1904 Proc. Royal Soc. 74 66 A pseudo-periodic function analogous to sin a.

1919 F. Cajori Hist. Math. (ed. 2) 416 It was Hermite who discovered pseudo-periodic functions of the second kind.

a1950 E. A. Milne Mod. Cosmol. (1952) iii. 38 We cannot distinguish between what we may be disposed to call a strictly periodic phenomenon and a pseudoperiodic phenomenon in which the period slowly changes.

1991 C. V. Jones Financial Risk Anal. Infrastructure Debt ii. 30 The variation at hand was really almost periodic or pseudoperiodic.

2002 R. D. Shilling & B. Shinn-Cunningham in K. M. Stanney Handbk. Virtual Environments iv. 71 Many real-world sounds are not strictly periodic... Examples of such pseudo-periodic signals include the sound produced by a flute or a vowel sound spoken aloud.