Any of the pentagonal or star-shaped stem ossicles of fossil pentacrinites; = astroite, n. 2.
单词 | θ33404 |
释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > division Pelmatozoa > class Crinoidea > fossil or encrinite > family Pentacrinidae > vertebral joint (1) star stone1652 Any of the pentagonal or star-shaped stem ossicles of fossil pentacrinites; = astroite, n. 2. |
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