Category: P

  • Pure Food and Drug Act of 1906

    Consumer protection law designed to ban foreign and interstate traffic in adulterated or mislabeled food and drug products that included cannabis on a list of dangerous and/or addictive drugs.  

  • Phytocannabinoids

    Cannabinoids that occur naturally in the cannabis plant.  

  • Pinnatisect leaf

    A leaf± deeply cut into pinnately-arranged lobes, cut almost to its midrib.  

  • Pinnatifid leaf

    A leaf± deeply cut into pinnately-arranged lobes, but not cut right to its midrib, the lobes remaining connected by at least a narrow flange of leaf-blade bordering the midrib.  

  • Pinnate veins

    With secondary veins along each side of the midrib, running parallel towards the leaf margin, like teeth of a comb, or sometimes re-joining to form a network.  

  • Pinnate leaf

    A compound leaf with the separate leaflets arranged along central axis in a feather-like arrangement. The leaf-stalk, usually in opposite pairs, and often with a terminal leaflet as well.    

  • Perianth segments

    The sepals and /or petals t hat make up the perianth of a flower (used mostly either w hen they are indistinguishable, or there is only one whorl).  

  • Parallel veins

    Veins that remain± the same distance apart along much of the leaf, running from the leaf-base to its tip.  

  • Palmately-lobed leaf

    A lobed leaf with the main veins all radiating from the t op of the stalk.  

  • Propylthiouracil

    A drug with a similar action to methimazole. It is used if patients develop side effects to methimazole or for hyperthyroidism in patients who are breastfeeding. A drug that is a thyroid hormone antagonist. A drug that reduces thyroid activity and is used to treat thyrotoxicosis and to prepare patients for surgical removal of the…