• (n. pl.) An extinct order of sea urchins found in the Paleozoic rocks. They had more than twenty vertical rows of plates. Called also Palaeechini.
Found on
http://thinkexist.com/dictionary/meaning/paleechinoidea/
Pa`le·ëch`i·noi'de·a noun plural [ New Latin See
Paleo- , and
Echinoidea .]
(Zoology) An extinct order of sea urchins found in the Paleozoic rocks. They had more than twenty vertical rows of plates. Called also
Palæechini . [ Written also
Palæechinoidea ....
Found on
http://www.encyclo.co.uk/webster/P/6
No exact match found.
