Definitions

1. noun

a fossil of a type of fossil jellyfish, particularly one of the species of the genus Cladocoryne.

“The paleontologist discovered a well-preserved jassoid in the ancient rock formation.”

2. noun

a type of fossilized jellyfish, particularly a member of the genus Cladocoryne or similar organisms.

“The museum displayed an impressive jassoid fossil found in the nearby area.”