Any of various marine organisms which contribute to the formation of limestones and other sedimentary rocks, typically by the accumulation or deposition of calcium carbonate (as in the skeletal remains of foraminiferans, corals, etc.) or by the trapping of sediment particles.
Origin
Mid 19th century.
Definition of rock-builder in US English:
rock-builder
noun
Any of various marine organisms which contribute to the formation of limestones and other sedimentary rocks, typically by the accumulation or deposition of calcium carbonate (as in the skeletal remains of foraminiferans, corals, etc.) or by the trapping of sediment particles.