单词 | peronium |
释义 | peroniumn. Zoology. In certain hydromedusae: a tentacle formed by an extension of the umbrellar ectoderm and lacking mesogloea. Usually in plural. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > class Hydrozoa > parts of medusoid1848 interradius1870 peronium1880 1880 Science 24 July 44/2 It holds exactly the position of the ‘mantelspangen’ or peronia, so well developed in the whole of the Narcomedusæ of Haeckel. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 749 In the Narcomedusæ,..a nerve extends from the outer ring beneath each peronium. 1968 J. Bouillon in M. Florkin & B. T. Scheer Chem. Zool. II. ii. i. 85 The medusae are generally very flattened, the bell margin festooned and divided by grooves differentiated into peronia, solid tentacles springing laterodorsally from the exumbrellar surface. Derivatives peˈronial adj. rare ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > of class Hydrozoa > relating to peronium peronial1898 1898 A. Sedgwick Student's Text-bk. Zool. I. 136 Otoporpae or peronial streaks of ectoderm passing from the auditory tentacles may be present. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1880 |
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