perradialadj.n.
/pəˈreɪdɪəl/, U.S. /pəˈreɪdiəl/ Zoology.† B. n.
A. adj.
Relating to or situated on the primary rays or axes in certain coelenterates and ctenophores; primarily radial.
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the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > relating to rays
radial1870
perradial1880
1880 E. R. Lankester in Nature 4 Mar. 414/1 An organ..may be..per-radial, inter-radial, or adradial in position.
1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 717 (Ctenophora) The funnel gives origin to two ‘perradial’ vessels.
1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) viii. 187 Organs, such as the arms, which lie symmetrically upon them [sc. the perradii] are said to be perradial in position.
1993 E. N. K. Clarkson Invertebr. Palaeontol. & Evol. (ed. 3) ix. 258/2 Amongst the spines are small organs of balance (spheridia), on the adoral part of the per-radial suture.
A perradial tentacle. Obsolete. rare.
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1892 J. A. Thompson Outl. Zool. 134 Tentacles—first four corresponding to the angles of the mouth (perradials), and the other four (interradials) between these, and..eight intervening adradials.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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adj.n.1880