Manicure terms, plainly explained
Most of the confusion around nail care comes from one word doing several jobs. Cuticle in everyday speech means the strip of skin you push back or trim; in anatomy it means something narrower. Getting the parts straight matters practically, because the tissue people cut most confidently is the one that should be left alone.
Working from the base of the nail outward:
- The lunula is the pale half-moon near the base — the visible part of the nail matrix, where the plate is made.
- The eponychium is the living fold of skin at the base. This is the part to leave alone. It seals the gap between skin and nail, and cutting it opens that seal.
- The cuticle proper is the thin layer of dead tissue the eponychium sheds onto the plate as it grows. This is what gets pushed back and removed — and it is not the same thing as the fold it came from.
- Pterygium is that layer when it grows abnormally and adheres to the plate.
- The nail plate is the hard part itself, sitting in the nail fold on either side.
- The hyponychium is the skin under the leading edge, where the plate lifts away from the finger.
- The free edge is the part past that — the bit you actually cut.
Two problems have their own entries because they are what people search for: hangnails, which are splits in the skin beside the nail rather than in the nail, and ingrown nails, where the plate grows into the fold instead of over it.
Which instrument suits which job is a separate question — the glossary of steel and sharpening covers what the tools are made of, and nippers, scissors or clippers covers what each one is for.
The thin band of dead tissue that the nail carries out from under the skin fold. It is the part that can be removed — unlike the living fold behind it.
The living fold of skin at the base of the nail. It seals the gap between nail and finger, which is why it is the one part that should not be cut.
The part of the nail that has grown past the fingertip and is no longer attached to the bed — the only part that is actually being cut or filed.
A strip of skin, not nail, that has torn away beside the nail. Cut it flush — pulling it takes living tissue with it.
The skin sealing the underside of the nail where the free edge lifts away. Sensitive, easily injured, and the reason short nails can feel tender.
A nail edge pressing into the skin fold beside it. Most often started by cutting the corner down — and made worse by cutting it again.
The pale half-moon at the base of the nail — the visible front edge of the matrix, where the nail is still forming and still soft.
The rims of skin framing the nail on three sides. They hold the plate in place and, along the sides, are where most manicure injuries happen.
The nail itself: layered keratin, formed in the matrix, sliding forward over the bed. Everything else in a manicure is either under it or around it.
Skin that has grown forward and attached to the nail plate itself. Not the same as an overgrown cuticle, and not something to scrape away by force.