metabelian
/ˌmɛtəˈbiːlɪən/(also meta-abelian) Mathematics
adjective
Of a group or a Lie algebra: expressible as an extension of one abelian group or Lie algebra by another abelian group or Lie algebra; having the property that its commutator subgroup or subalgebra is abelian.
Origin
Early 20th century (in an earlier sense). From meta- + Abelian.