coccolith

/kok-uh-lith/US // ˈkɒk əˌlɪθ //UK // (ˈkɒkəlɪθ) //

椰石,茧石,椰壳岩,椰壳石

Definitions

n.名词 noun

1
- : a microscopic calcareous disk or ring making up part of the covering of certain marine plankton and forming much of the content of chalk rocks.