from The Century Dictionary.

  • noun A genus of foraminiferous rhizopods, typical of the family Astrorhizidæ and the subfamily Astrorhizinæ. The species are of considerable size.
  • noun [lowercase; pl. astrorhizæ.] In the fossil hydrocorallines named Stromatoporoidea, one of the shallow stellate furrows on the surfaces of successive laminæ which radiate outward from numerous centers.


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