'marine-precipitated' originates from an English compound of 'marine' and 'precipitate'; 'marine' ultimately comes from Latin 'marinus' (from 'mare') meaning 'of the sea', and 'precipitate' comes from Latin 'praecipitatus' (from 'praecipitare') where the root meant 'to throw or hurl down'.

'marine' entered English via Old French and Middle English from Latin 'marinus'; 'precipitate' entered English from Late Latin 'praecipitatus'/'praecipitare' via Middle French and Medieval Latin, evolving into the modern verb and adjective 'precipitate' and then forming compounds such as 'marine-precipitate'.

Initially, 'precipitate' (from Latin) carried the sense 'to throw down' or 'to thrust headlong'; over time it gained the chemical sense 'to separate from solution' and in compounds like 'marine-precipitated' it now denotes material 'formed by precipitation from seawater'.