Biology Dictionary

  • Orchidectomy

    Orchidectomy

    The surgical removal of one or both testicles.

  • Orchidocele

    Orchidocele

    A condition involving the herniation of the testicle into the inguinal canal.

  • Orchiocele

    Orchiocele

    A term used for a hernia of the testicle or the sac containing it.

  • Orchiodynia

    Orchiodynia

    Pain in the testicle, often resulting from trauma or infection.

  • Orchis

    Orchis

    A genus of flowering plants in the family Orchidaceae, often known for their beautiful and intricate flowers.

  • Order in taxonomy

    Order in taxonomy

    A taxonomic rank used in the biological classification of organisms, below class and above family.

  • Ordinal

    Ordinal

    Relating to order or sequence, often used in biological classification systems to describe rank in taxonomy.

  • Ordovician period (O)

    Ordovician period (O)

    A geological period from approximately 485 to 443 million years ago, known for the diversification of marine life.

  • Onyxis

    Onyxis

    The condition or disease of the nails, also referred to as onychopathy.

  • Oocyte

    Oocyte

    A female germ cell or egg cell that is capable of undergoing fertilization.