Mandrake n. : A low plant (Mandragora officinarum) of the Nightshade family, having a fleshy root, often forked, and supposed to resemble a man. It was therefore supposed to have animal life, and to cry out when pulled up. All parts of the plant are strongly narcotic. It is found in the Mediterranean region.

Mandrake n. : The May apple (Podophyllum peltatum). See May apple under May, and Podophyllum.

Example:
How safe would it be to brew a beer with Mandrake root?

Taxonomy
mandrake, plant, mandrake root, Mandragora, mandrakes, scream, mandrake plant, novel, monster, earth, Mandrake the Magician, unranked, the roots, dog, android, character, dolls, attack.

Defination from the web:
... Mandrake is the common name for members of the plant genus Mandragora belonging to the nightshades family (Solanaceae) ...