bellyband

Short definition from Wiktionary

Noun

1. 1
   A strap around the belly of a horse or other draft animal used to secure a saddle or the shafts of a cart.
2. 2
   Various constrictive bands worn around the belly: A band worn by expectant mothers to constrict and support the fetus.
3. 3
   Various constrictive bands worn around the belly: A band worn by babies to protect the navel.
4. 4
   Various constrictive bands worn around the belly: A haramaki: a band of cloth worn around the abdomen to preserve stomach qi and boost circulation.
5. 5
   A band of canvas used to strengthen a sail.
6. 6
   A type of dust jacket that covers only a portion of a book.