Bimodal
Bimodal describes a distribution that seems to be a mixture of two basic distributions
Examples often use two gaussian-ish humps, in part to point out these are not strictly separable while still being useful to us.
Pointing out that something is bimodal
often comes up in cases where it's convenient to simplify into something with two distinct, clearly separated cases,
and more so in cases where that is a simplification with problems.