Adjective metamorphous has 2 senses

• metamorphous(a = adj.pert) metamorphic - of or relating to metamorphosis (especially of rocks); "metamorphic stage"; "marble is a metamorphic rock that takes a high polish"
Derived form noun metamorphosis₃

• metamorphous(s = adj.all) Array - produced by metamorphosis; "most insects are metamorphic as witness the stages as a butterfly develops from a caterpillar"
Derived form noun metamorphosis₃