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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