| 单词 | Hemizonida |
| 释义 | Hemizonida [¦he·mē`zän·ǝ·dǝ] PALEONTOLOGY A Paleozoic order of echinoderms of the subclass Asteroidea having an ambulacral groove that is well defined by adambulacral ossicles, but with restricted or undeveloped marginal plates. |
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