One of the mysteries of the English language finally explained.
Treated as plural. A major group of animals containing invertebrates whose body plan shows a radial structure: (originally) a division including coelenterates, echinoderms, and various intestinal and other worms (now historical); (now) a group comprising the cnidarians and ctenophores. (Also in form radiata) animals of this group (collectively or individually).
Early 19th century; earliest use found in John Stark (fl. 1828). From scientific Latin Radiata, neuter plural of classical Latin radiātus.
In full "radiata pine". = Monterey pine.
1950s; earliest use found in New Zealand Journal Forestry. From scientific Latin radiata, specific epithet from classical Latin radiātus.
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