No precise information about the extent of trade in jet can be expected until different varieties of jet have been more precisely defined.

In 2004 a new variety of the species was named and defined, var.

An analytic variety is defined locally as the set of common solutions of several equations involving analytic functions.

If in addition the variety is defined over a field of characteristic 0, we have the following assertion, sometimes referred to as the Contraction Theorem:

These varieties are defined by specific phonetic, morphological or lexical traits, and sometimes by a distinctive literary tradition.

A toric variety is defined by a fan, a collection of cones in a lattice.

A variety of different metrics can be defined on a shift space.

When degrees of freedom is used instead of dimension, this usually means that the manifold or variety that model the system is only implicitly defined.

Each variety of bands can be defined by a single defining identity.

While varieties of tisanes are defined as any plant material for infusion, below is a list of common herbs: