Tobacco

Tobacco

Relating to products that are made from the leaves of plants in the genus Nicotiana, that are used in some medecines but more widely and popularly used as a recreational drug in the form of cigarettes and cigars.

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turgor pressure

Plants; Flowers

Force exerted outward on a cell wall by the water contained in the cell. This force gives the plant rigidity, and may help to keep it erect.

vegetative growth

Plants; Flowers

Growth of a plant by division of cells, without sexual reproduction.

venation

Biology; Flowers

The arrangement and pattern of veins in a leaf.

whorl

Plants; Flowers

An arrangement of appendages, such as branches or leaves, such that all are equally spaced around the stem at the same point, much like the spokes of a wheel or the ribs of an ...