urochord
/ˈjʊərə(ʊ)kɔːd/ /ˈjɔːrə(ʊ)kɔːd/Zoology
noun
1A notochord that is confined to or present in the tail region, especially as characteristic of certain tunicates (urochordates). Now rare.
2= urochordate rare.
Origin
Late 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From uro- + chord.