In an invertebrate with radial symmetry, as a cnidarian or an echinoderm: any of the tertiary (third order) rays or axes (each located between a perradius and an interradius).
Origin
1960s; earliest use found in The Biological Bulletin. From ad- + radius.
Definition of adradius in US English:
adradius
nounaˈdreɪdɪəs
Zoology rare
In an invertebrate with radial symmetry, as a cnidarian or an echinoderm: any of the tertiary (third order) rays or axes (each located between a perradius and an interradius).
Origin
1960s; earliest use found in The Biological Bulletin. From ad- + radius.