Biology Dictionary

  • Macroevolution

    Macroevolution

    Large-scale evolutionary changes that occur over long geological periods, leading to the formation of new species or major changes in biodiversity.

  • Macrofossil

    Macrofossil

    A fossil of a large organism, typically visible without a microscope, such as bones or shells.

  • Macromolecule

    Macromolecule

    A large molecule, typically made up of smaller subunits, such as proteins, nucleic acids, and polysaccharides.

  • Macronucleus

    Macronucleus

    The large nucleus in certain protozoans, responsible for controlling the cell’s metabolic functions and activities.

  • Macronutrients

    Macronutrients

    Essential nutrients required by organisms in large amounts, such as carbohydrates, proteins, and fats.

  • Macrophage

    Macrophage

    A type of white blood cell involved in the immune system that engulfs and digests pathogens and cellular debris.

  • Macropodid

    Macropodid

    A member of the family Macropodidae, which includes kangaroos, wallabies, and related marsupials.

  • Macropodidae

    Macropodidae

    The family of marsupials that includes kangaroos, wallabies, and other similar animals.

  • Lumbocostal

    Lumbocostal

    Pertaining to the lower ribs and the lumbar region of the spine.

  • Lumen

    Lumen

    The interior space or cavity of a tubular structure, such as a blood vessel or the digestive tract.