What is an order of Echini, including the irregular sea urchins, as the spatangoids. See Spatangoid called?
petalosticha — An order of Echini, including the irregular sea urchins, as the spatangoids. See Spatangoid. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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