Noun
pelvic floor (plural pelvic floors)
(anatomy) A muscular partition, formed by the muscle fibers of the levator ani, the coccygeus, and associated connective tissue, which spans the area underneath the pelvis.
Synonym: pelvic diaphragm
I did used to like trampolining, but I'm probably past it, I think. You need to have a really strong pelvic floor to be good at trampolining, and I've had three children. Tamsin Greig