Poppy seed is a type of small, kidney-shaped seed obtained from the opium poppy plant. They have a distinct nutty flavor and are often used as a garnish or ingredient in various culinary dishes, such as bread, pastries, and salads. Poppy seeds are also known for their oil content and are valued for their medicinal properties. However, it's important to note that consuming large quantities of poppy seeds can result in the presence of trace amounts of opiates in the body, so moderation is advised.