sb. and a. Zool. [ad. mod.L. Spatangoides, f. Spatangus (late L. spatangius, Gr. σπατάγγης): see -OID.] a. sb. A sea-urchin belonging or related to the genus Spatangus (heart-urchins). b. adj. Having the characteristics of this.
1857. Agassiz, Contrib. Nat. Hist. U.S., I. 114. Next come true Echinoids, later only Spatangoids.
1877. Encycl. Brit., VII. 630/2. In some Spatangoid genera the corona bears symmetrical bands of minute tubercles with attached spines.
