Biology Dictionary

  • Antisense strand

    Antisense strand

    The DNA strand that serves as the template for mRNA synthesis; also used in antisense RNA technology in plants.

  • Antitoxin

    Antitoxin

    A substance that neutralizes toxins; not produced by plants, but plants can produce toxin-binding proteins.

  • Antitussive

    Antitussive

    A medication that suppresses coughing; some plant extracts are used as natural antitussives.

  • Anura

    Anura

    An order of amphibians that includes frogs and toads, characterized by lack of tail and strong hind limbs.

  • Anus

    Anus

    The terminal opening of the digestive tract through which waste is eliminated.

  • Aorta

    Aorta

    The main artery in the body that carries oxygenated blood from the heart to the rest of the body.

  • Aortic semilunar valve

    Aortic semilunar valve

    A valve in the heart that prevents backflow of blood from the aorta into the left ventricle.

  • Aphasia

    Aphasia

    A disorder affecting speech and language skills due to brain damage; not related to plants.

  • Aphetic

    Aphetic

    Relating to the origin or primitive condition; often used in evolutionary contexts.

  • Apical

    Apical

    Relating to or situated at the apex or tip of a structure, such as a plant root or shoot.