Borrowed from German Meerschaum.

• IPA: /ˈmɪər.ʃɔːm/, /mɪər.ʃəm/

meerschaum

1. (uncountable) A soft white mineral, chiefly used for smoking-pipes and cigar holders.

   Synonyms: sepiolite

2. (countable) A smoking-pipe made from meerschaum.
   • 1831, L[etitia] E[lizabeth] L[andon], chapter XXII, in Romance and Reality. […], volume II, London: Henry Colburn and Richard Bentley, […], →OCLC ↗, page 330 ↗:

     The sale of part of his property cleared the rest. A large portion of his income was put aside to accumulate. Horses, pictures, wines, bijouterie, German meerschaum, and Turkish hookahs, were alike brought to the hammer.

• French: écume de mer
• German: Meerschaum

• German: Meerschaum