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splayfoot/splay·foot/ (spla´foot) flatfoot.
n. pl. splay·feet (-fēt′)
1. A physical deformity characterized by abnormally flat and turned-out feet.
2. A foot so affected.
Etymology: ME, splaien + AS, fot
a foot that is flat and extremely everted, away from the midline. Also called talipes valgus.