The collection of medicinal material from natural plant populations with or without considering their sustainable use.

When the margin is alternately convex and concave.

Anglo-Saxon for herb lore.

Layer or mass of dead tissue separated from surrounding living tissue.

To separate the chaff from grain or seed by wind or a forced current of air; eliminating the dry covering…

An atrial arrhythmia that occurs when the natural cardiac pacemaker site shifts between the sino-atrial node, the atria and/or the…