Palaeechinoidea
plural noun
Palae·echinoidea
in some classifications
: a division of extinct chiefly Paleozoic sea urchins having the test usually composed of more than 20 meridional rows of plates that often overlap and jaws always present compare euechinoidea
palaeechinoidean
adjective or noun
¦⸗⸗+
Dictionary Entries Near Palaeechinoidea
Cite this Entry
“Palaeechinoidea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Palaeechinoidea. Accessed 26 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share