Glossary

Category: O

  • Onychosis

    Any disease or disorder of the nails.    

  • Onychomadesis

    Onychomadesis

    A condition in which the nails fall out. The complete loss or shedding of the nails. The separation and falling off of a nail plate from the nail bed; affects fingernails and toenails. A condition where one or several nails periodically fall off.  

  • Onycholysis

    A condition in which a nail becomes separated from its bed, without falling out. Separation of the nail from its normal attachment to the nail bed; associated with trauma, certain infections, and other disorders of the skin. Loosening of the nail from the nail bed. A condition in which the nail plate separates from the…

  • Onychogryphosis

    Onychogryphosis

    A condition in which the nails are bent or curved over the ends of the fingers or toes. Inflammation of the matrix of the nail, which results in loss of the nail. Gross thickening and hardening of the nail, which becomes elongated and deformed. The cause is unknown. A distortion of the nail in which…

  • Onychia

    Onychia

    An irregularity of the nails caused by inflammation of the matrix. Inflammation of the nailbed with possible suppuration and loss of the nail. Inflammation of the nail matrix, followed by shedding of the natural nail.  

  • Onychauxis

    Onychauxis

    Excessive growth of the nails of the fingers or toes.  

  • Onset

    The beginning of something.  

  • Ondansetron

    A drug which helps to prevent the production of serotonin, used to control nausea and vomiting caused by drug treatment and radiotherapy for cancer. Ondansetron is a serotonin antagonist medication utilized to manage nausea and vomiting resulting from surgical procedures, radiotherapy, or cancer drugs. It can be consumed as tablets, administered via suppositories, or injected.…

  • Oncotic

    Referring to a tumour. Characterized by a tumor or swelling.  

  • Oncometer

    An instrument for measuring swelling in an arm or leg using changes in their blood pressure. An instrument for measuring the variations in size of the kidney and other organs of the body. An instrument for measuring the volume of blood circulating in one of the limbs.