| A | B |
| Agnail | a condition in which the cuticle splits around the nail. |
| Blue nail | can be causd by poor blood circulation or a heart disorder. |
| Bruised nail | will have dark purplish spots, usually due to injury or bleeding under the nail. |
| Cuticle of nail | is the overlapping skin around the nail. |
| Eggshell nails | nails that have a noticeably thin, white nail plate and are more flexible than normal. |
| Eponychium | the extension of the cuticle at the base of the nail body that partly overlaps of lunula. |
| Half-moon | located at the base of the nail. |
| Hangnail | a condition in which the cuticle splits around the nail. |
| Hypertrophy | an overgrowth of the nail, usually in thickness rather than length. |
| Hyponyshium | that portion of the epidermis under the free edge of the nail. |
| Ingrown nail | nail growth into the sides of the flesh and can cause an infection. |
| Keratin | a protein that is the chief component of hair and nails. |
| Leuconychia | appear frequently in the nails, but do not indicate disease. |
| Lunula | located at the base of the nail. |
| Mantle | the deep fold of skin in which the nail root is embedded. |
| Mold | a type of fungus infection caused when moisture is trapped between an unsanitized natural nail. |
| Nail | an appendage of the skin, a horny, translucent plate that protects the tips of the fingers and toes. |
| Nail bed | the portion of the skin upon which the nail body rests. |
| Nail body | the visible portion of the nail that rests upon and is attached to the nail bed. |
| Nail corrugations | are wavy ridges, caused by uneven growth of the nails. |
| Nail cuticle | the overlapping skin around the nail. |
| Nail free edge | the end portion of the nail plate that reaches over the tip of the finger or toe. |
| Nail furrows | in the nails can run either lengthwise or aross the nail. |
| Nail grooves | slits or tracks at either side of the nail upon which the nail moves as it grows. |
| Nail matrix | the part of the nail bed that extends beneath the nail root and contains nerves, lymph and blood vessels to nourish the nail. |
| Nail plate | the visible portion of the nail that rests upon and is attached to the nail bed. |
| Nail root | at the base of the nail and is embedded underneath the skin. |
| Nail walls | the folds of skin overlapping the sides of the nail. |
| Onychatrophia | the wasting away of the nail. |
| Onychauxis | an overgrowth of the nail, usually in thickness rather than length. |
| Onychia | an inflammation of the nail matrix, accompanied by pus formation. |
| Onychocryptosis | nail growth into the sides of the flesh and can cause an infection. |
| Onychogryphosis | pertains to enlarged and increased curvature of the nail. |
| Onycholysis | a loosening of the nail, without shedding. |
| Onychomycosis | an infectious disease caused by a fungus. |
| Oncyhophagy | a nervous habit that prompts the individual to chew the nail or the hardened cuticle. |
| Onychophosis | refers to a growth of a horny epithelium in the nail bed. |
| Onychophyma | denotes a swelling of the nail. |
| Onychoptosis | the periodic shedding of one or more nails, either in part or in whole. |
| Onychosis | a technical term applied to nail disease. |
| Onyx | the technical term for the nail. |
| Paronychia | an infection and inflammatory condition of the tissues surrounding the nails. |
| Pterygium | a forward growth of the cuticle that adheres to the base of the nail. |
| Ringworm | a highly contagious disease caused by a fungus. |
| Vesicle | a blister with clear fluid in it. |
| Free edge | the end portion of the nail plate that reaches over the tip of the finger or toe. |