Letter S

Supernumerary

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Beyond the normal number.

Anything supernumerary is extra.

A supernumerary chromosome is an extra one beyond the usual number of 46. A supernumerary digit is an extra finger or toe.

A supernumerary nipple is an extra nipple beyond the usual one on either side.

A supernumerary placenta is an extra placenta (afterbirth) and is called an accessory or succenturiate placenta.

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