The Collaborative International Dictionary of English v.0.48:
Sea froth \Sea" froth`\ (?; 115). See Sea foam, 2. [1913 Webster] Sea-gateThe Collaborative International Dictionary of English v.0.48:
Sea foam \Sea" foam`\ 1. Foam of sea water. [1913 Webster] 2. (Min.) Meerschaum; -- called also sea froth. [1913 Webster]