What is another word for echinus?
Pronunciation: [ˈɛt͡ʃɪnəs] (IPA) 
"Echinus" is a term used to refer to various animals with spiny shells, including sea urchins and certain species of starfish. There are several synonyms for the term "echinus" that you might come across in different contexts. For example, the term "sea urchin" is often used interchangeably with "echinus" when referring to these creatures. Another synonym for "echinus" is "echinoderm," a broader term that encompasses not just sea urchins, but also species such as sea cucumbers and sand dollars. In general, these synonyms are used to describe similar creatures, all of which feature spiny, calcareous shells that help protect them from predators.
