urochordateadj.n.
/ˌjʊərə(ʊ)ˈkɔːdeɪt/, /ˌjɔːrə(ʊ)ˈkɔːdeɪt/, U.S. /ˌjʊrəˈkɔrˌdeɪt/ Zoology.
A. adj.
Of or relating to the group Urochordata.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > division Molluscoidea > [adjective] > of or belonging to Tunicata
tunicated1840
tunicate1847
urochordate1877
1877 E. R. Lankester Notes Embryol. & Classification 43 The evidence of degeneration..is equally incontestible in that very large and varied group of non-parasitic organisms, the Tunicata (Urochordate Vertebrata).
1954 Systematic Zool. 3 163/2 Because urochordate development is largely mosaic, we need not question that the chordates are primitively regulatory in their development.
1977 J. Cohen Reproduction i. 5 The urochordate salps and sea squirts.
2003 Science 13 Dec. 2157/2 It is generally believed that cephalochordates and vertebrates are sister groups, with the urochordate lineage most basal among the chordates.
B. n.
An animal of the group Urochordata; a tunicate.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > division Molluscoidea > [noun] > division Tunicata > member of
tunicary1835
tunicate1848
urochord1885
urochordate1895
1895 I. K. Funk et al. Standard Dict. Eng. Lang. II. at Uro-1 Urochordate, a. & n.
1903 B. P. Colton Zoölogy i. x. 149 Subbranch Urochorda. As an example of the urochordates we may take the common ascidian.
1936 H. V. Neal & H. W. Rand Compar. Anat. i. 20 Of the four orders of Urochordates the Larvacea are of special interest since they develop without metamorphosis.
1963 R. D. Barnes Invertebr. Zool. xx. 592/1 The urochordates..deserve some attention.
2004 Nature 2 Sept. p. ix Vertebrates and Urochordates are evolution's two successful chordate groups.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).
<
adj.n.1877