| 释义 |
ple·o·sponge
\ˈplēəˌspənj\ noun
Etymology: New Latin Pleospongia, from pleio- + -spongia
: any of various Lower and Middle Cambrian calcareous, cylindrical or cup-shaped, double-walled, porous fossils that may be the remains of sponges or primordial precursors of the true corals |