Seabiscuit was a champion Thoroughbred racehorse in the United States.
Seabiscuit or sea biscuit may also refer to:
Hardtack, a hard type of edible beaten biscuit Seabiscuit: An American Legend, a 2001 book by Laura Hillenbrand about the horse of the same name Seabiscuit (film), a 2003 film based on the book Sea biscuit (echinoderm), (Clypeaster) a genus of echinoderms Sea Biscuit, a 1994 album by Spacetime Continuum Sea biscuit, several species of sand dollar sea urchins Nickname of Max Seibald (born 1987), American lacrosse player Nickname of Jimmy Wilkes (1925–2008), American baseball player
See also Biscuit, an inflatable ring towed behind a boat in tubing Biscuit (disambiguation) The Story of Seabiscuit, a 1949 American drama film directed by David Butler starring Shirley Temple