单词 | actinopod |
释义 | actinopodn.adj. Zoology. A. n. 1. A holothurian of the former order Actinopoda. rare. Now disused. ΚΠ 1896 H. M. Bernard & M. Bernard tr. A. Lang Text-bk. Compar. Anat. II. viii. 428 (caption) Section through the oral region of an Actinopod. 2. A protozoan of the group Actinopoda. ΚΠ 1956 D. J. Jones Introd. Microfossils iii. 22 Subclass Radiolaria. Actinopods with siliceous or sulfatic exoskeleton, very common as microfossils. 1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) ii. 186/1 Actinopods, heterotrophic protoctists, are distinguished by their long slender, cytoplasmic axopods, also called axopodia. B. adj. 1. Of or relating to holothurians of the former order Actinopoda. rare. Now disused. ΚΠ 1900 F. A. Bather et al. in E. R. Lankester Treat. Zool. III. xiii. 235 It has been shown above that the Actinopod Holothurians fall into two groups. 2. Of or relating to protozoans of the group Actinopoda. ΚΠ 1967 G. E. Hutchinson Treat. Limnol. II. xviii. 27 The other actinopod classes, namely the Acantharia, probably descended..directly from Chrysophyceae and the Radiolaria, are exclusively marine. 1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) ii. 186/1 In the absence of comprehensive information, we retain the traditional actinopod grouping, with its four classes. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < n.adj.1896 |
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