coccolith
Noun
Meaning
One of a kind of minute, calcareous bodies, probably vegetable, often abundant in deep-sea mud.
Source: Webster's dictionaryExamples
For example, coccolithophores use H + ion channels in to constantly pump H + ions out of the cell during coccolith production.
Decreasing coccolith mass is related to both the increasing concentrations of CO 2 and decreasing concentrations of CO 3 in the world’s oceans.