Definify.com
Webster 1913 Edition
Paleechinoidea
‖
Paˊle-ëchˊi-noi′de-a
,Noun.
pl.
[NL. See
Paleo-
, and Echinoidea
.] (Zool.)
An extinct order of sea urchins found in the Paleozoic rocks. They had more than twenty vertical rows of plates. Called also
Palaeechini
. [Written also
Palaeechinoidea
.]