  In this communication, the approach of phenomenological universalities of
growth are considered to describe the behaviour of a system showing oscillatory
growth. Two phenomenological classes are proposed to consider the behaviour of
a system in which oscillation of a property may be observed. One of them is
showing oscillatory nature with constant amplitude and the other represents
oscillatory nature with a change in amplitude. The term responsible for damping
in the proposed class is also been identified. The variations in the nature of
oscillation with dependent parameters are studied in detail. In this
connection, the variation of a specific growth rate is also been considered.
The significance of presence and absence of each term involved in
phenomenological description are also taken into consideration in the present
communication. These proposed classes might be useful for the experimentalists
to extract characteristic features from the dataset and to develop a suitable
model consistent with their data set.
