Medical Marijuana Glossary

Medical Marijuana Glossary

Browse the glossary using this index

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measurement of light output - one lumen is equal to the amount of light emitted by one candle that falls on one square foot of surface located one foot away from one candle



one or all of the primary nutrients N-P-K (nitrogen, phosphorus, or potassium) or the secondary nutrients Mg (magnesium) and Ca (calcium)


trim leaves and large stems from buds with scissors or fine pruners so the most THC-potent portion remains


cannabis; illegal drug in many countries, inhaled or ingested for its THC content

Meristem Pruning

cutting away the growth tip to encourage branching and limit height


one-millionth of a meter


trace elements necessary for plant health, including S, Fe, Mn, B, Mb, Zn, and Cu


0.04 inch


manufacture rain with a spray bottle

Moisture Meter

electronic device that measures the moisture content of a substrate at any given point


producing only one color: LP sodium lamps are monochromatic


having male (staminate flowers) and female (pistillate flowers) reproductive systems or flowers on the same plant


the study of the form and structure of animals and plants

Mother Nature

the vast outdoors and all she holds: A mother plant may be grown from seed or be a clone

Mother Plant

female marijuana plant held in vegetative state and used for cutting (cloning) stock: A mother plant may be grown from seed or be a clone


a protective covering for the soil of compost, old leaves, paper, rocks, etc.: Indoors, mulch keeps soil too moist and possible fungus could result - Outdoors, mulch helps soil retain and attract moisture


an inheritable change in genetic material


the mass of strands that form the root-like part of fungi, often submerged in soil or a host body



nitrogen, phosphorus, and potassium: the three major plant nutrients

Nanometer (nm)

0.000000001 meter, one billionth of a meter, nm is used as a scale to measure electromagnetic wavelengths of light: Color and light spectrums are expressed in nanometers


localized death of a plant part due to injury or disease

Nitrogen (N)

essential element to plant grow; one of the three major nutrients N-P-K


a joint: the position on a stem from which leaves, shoots, or flowers grow


gardening business that grows plants for sale or experimentation: A nursery is a great place to gather information


plant food, essential elements N-P-K as well as secondary and trace elements fundamental to sustaining plant life

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