ASCIDIANS
\ɐssˈɪdi͡ənz], \ɐssˈɪdiənz], \ɐ_s_s_ˈɪ_d_iə_n_z]\
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A subphylum of chordates intermediate between the invertebrates and the true vertebrates. It includes the Ascidians.
By DataStellar Co., Ltd
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a-sid'i-anz, n.pl. a group belonging to the tunicate Mollusca, forming a class of degenerate survivors of ancestral vertebrates, asymmetrical marine animals with a tubular heart and no feet, of a double-mouthed flask shape, found at low-water mark on the sea-beach.--n. ASCID'IUM, a genus of Ascidians: (bot.) a pitcher-shaped, leafy formation, as in the Nepenthes. [Gr. askidion, dim. of askos, a leathern bag, wine-skin.]
By Thomas Davidson
Word of the day
Proto Oncogene Proteins c erbB 2
- cell surface protein-tyrosine kinase that is found to be overexpressed in significant number adenocarcinomas. It has extensive homology can heterodimerize EGF EPIDERMAL GROWTH FACTOR), 3 receptor (RECEPTOR, 3) and the 4 receptor. Activation of erbB-2 receptor occurs during heterodimer formation with a ligand-bound erbB family members. EC 2.7.11.-.