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2026-01-26

“perradius”的英英意思

单词

perradius

释义

‖ perradius Zool.|pəˈreɪdɪəs|
Pl. -ii |-ɪaɪ|.
[mod.L., f. per- 4 + radius n.]
Each of the primary rays or radiating parts of certain cœlenterates.
1880E. R. Lankester in Nature 4 Mar. 414/1 The first four radii [of a discomedusan hydrozoan] to appear in the course of the growth from a simpler phase of development are called the per-radii, the next four (between these) the inter-radii, the next eight between these the adradii.

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