| CEPHALOCHORDATE | • cephalochordate n. Any of the primitive fishlike creatures, of the subphylum Cephalochordata, including the lancelets… • cephalochordate adj. Of or pertaining to these creatures. • CEPHALOCHORDATE n. any of a number of chordate fishlike animals (including the lancelets and amphioxus), having a persisting notochord projecting beyond the nerve cord to the end of the snout. | 
| CHORDA | • Chorda prop.n. A taxonomic genus within the family Chordaceae – certain thalloid brown algae. • CHORDA n. (Latin) a primitive sort of spinal column. | 
| CHORDAE | • CHORDA n. (Latin) a primitive sort of spinal column. | 
| CHORDAL | • chordal adj. (Mathematics, music) Of, pertaining to, or consisting of chords. • chordal adj. (Music) Having an accompaniment of chords rather than a countermelody. • chordal adj. (Zoology) Having a notochord; chordate. | 
| CHORDAMESODERM | • chordamesoderm n. (Anatomy) The axial mesoderm, which lies along the central axis under the neural tube and gives rise to the notochord. • CHORDAMESODERM n. the layer of specialized cells in the middle of a developing embryo which forms the notochord and structures of the central nervous system. | 
| CHORDAMESODERMS | • CHORDAMESODERM n. the layer of specialized cells in the middle of a developing embryo which forms the notochord and structures of the central nervous system. | 
| CHORDATE | • chordate n. A member of the phylum Chordata; numerous animals having a notochord at some stage of their development;… • chordate adj. Of such animals. • CHORDATE n. an animal having a backbone. | 
| CHORDATES | • chordates n. Plural of chordate. • CHORDATE n. an animal having a backbone. | 
| HEMICHORDATE | • hemichordate n. (Biology) Any of many marine worms, of the phylum Hemichordata, that have a primitive notochord. • hemichordate adj. Of, pertaining to, or characteristic of these animals. • HEMICHORDATE n. a kind of marine worm. | 
| HEMICHORDATES | • hemichordates n. Plural of hemichordate. • HEMICHORDATE n. a kind of marine worm. | 
| NOTOCHORDAL | • notochordal adj. Of or pertaining to the notochord. • NOTOCHORDAL adj. relating to the notochord, a backbone-like series of cells in the lowest vertebrates. | 
| OCTACHORDAL | • OCTACHORDAL adj. relating to an octachord. | 
| PROTOCHORDATE | • protochordate n. Any chordate of the phyla Hemichordata, Urochordata or Cephalochordata. • PROTOCHORDATE n. a member of the Protochordata. | 
| PROTOCHORDATES | • protochordates n. Plural of protochordate. • PROTOCHORDATE n. a member of the Protochordata. | 
| TETRACHORDAL | • tetrachordal adj. (Music) Relating to a tetrachord. • TETRACHORDAL adj. having four chords. | 
| UROCHORDAL | • urochordal adj. (Zoology) Of or pertaining to the Urochorda. • UROCHORDAL adj. of or pertaining to the Urochorda, tunicates. | 
| UROCHORDATE | • urochordate n. (Zoology) Any marine invertebrate of the subphylum Urochordata; the sea squirts. • UROCHORDATE n. a member of the Urochordata, tunicates. | 
| UROCHORDATES | • urochordates n. Plural of urochordate. • UROCHORDATE n. a member of the Urochordata, tunicates. |