one-piece

US /ˈwʌn.piːs/
UK /ˈwʌn.piːs/
"one-piece" picture
1.

a garment made in one piece, especially a swimsuit or a baby's garment

:
She wore a stylish one-piece swimsuit to the beach.
The baby looked adorable in his fuzzy one-piece.
1.

made in a single unit or piece

:
The new desk has a one-piece top, making it very sturdy.
The engineer designed a one-piece casing for the electronic device.