Related Clues:
- Runner-advancing fly ball
- Fluid-filled pouch
- Plat pouch
- Distended membrane; pouch-like cavity
- Bodily cavity enclosed by a membrane
- Membranous cavity
- Pouch-like structure
- Pouch or bag-like structure
- Bag-like cavity
- In part it's a convenient container for yolk
- ___ fly (R.B.I. producer)
- Onetime tribe of the Upper Midwest
- Anatomical container
- Bursa, e.g
- Queen ___ (bold chess move, for short)