Nancy’s Own
Cannabis Dictionary.

1,3,8-p-Menthatriene

Named 10-carbon hydrocarbon in the menthatriene group; the numbers specify double-bond locations.

12/12

Shorthand for 12 hours of light and 12 hours of darkness in each 24-hour period.

18/6

Shorthand for 18 hours of light and 6 hours of darkness per day.

20/4

Shorthand for 20 hours of light and 4 hours of darkness per day.

24/0

Shorthand for continuous light and no scheduled dark interval.

3-Carene

Bicyclic monoterpene, also called delta-3-carene; a 10-carbon hydrocarbon.

3-Thujene

Thujene-family monoterpene name used in chemical reporting; full identifiers clarify the precise isomer.

4/20

Cannabis-culture reference associated with April 20 and sometimes 4:20; meanings extend beyond a literal date or time.

420

Cannabis-culture reference associated with April 20 and sometimes 4:20; meanings extend beyond a literal date or time.

510 thread

Common screw-thread connection format for certain vape batteries and cartridges; compatibility involves more than the name.

6,9-Guaiadiene

Guaiadiene-family sesquiterpene; numbers specify double-bond positions on a 15-carbon framework.

7/10

Cannabis-culture reference associated with concentrates; 710 resembles OIL when inverted.

710

Cannabis-culture reference associated with concentrates; 710 resembles OIL when inverted.

A-frame hydroponic system

Hydroponic structure with channels or supports arranged in an A-shaped frame.

aa

A homozygous genotype with two a alleles; it shows the modeled recessive category under complete dominance.

Aa

A heterozygous genotype with one A allele and one a allele at one teaching locus.

AA

A homozygous genotype with two A alleles at one teaching locus. Uppercase does not mean better or more common.

aabb

A two-locus genotype homozygous for a and b; under complete dominance it shows both modeled recessive categories.

AaBb

Genotype notation for an individual heterozygous at two modeled loci.

Example: A/a and B/b are the two allele pairs.

AABB

A two-locus genotype homozygous for A at the first locus and B at the second locus.

Accession

Identified genetic sample or collection entry with a unique record.

Achene

Small dry fruit containing one seed, with the fruit wall not fused to the seed coat; a cannabis “seed” includes this fruit covering.

Adult-use

Cannabis market category for adults outside a medical program; legal definitions vary.

Adventitious bud

Bud forming outside the usual terminal or leaf-axil positions.

Aeroponics

Soilless system in which roots hang in air and receive nutrient solution as droplets or mist.

Aggregate hydroponics

Hydroponics with a solid root-support medium supplied with nutrient solution.

Air circulation

Movement of air within a crop or space to reduce stagnant zones.

Air conditioner

Equipment that removes heat from a space; many units also remove moisture.

Air duct

Passage carrying ventilation or conditioned air.

Air exchange

Replacement of air in a growing space with air from outside that space; it differs from recirculating air with an internal fan.

Air intake

Opening or assembly through which incoming air enters a space.

Air pump

Pump that moves air, commonly for aerating a nutrient reservoir.

Air stone

Porous diffuser that releases air bubbles into water.

Airflow

Movement of air through or within a space.

Airy buds

Flower clusters with relatively open, loose structure.

Alfalfa meal

Ground alfalfa material used as an organic amendment and nutrient source.

Allele

Alternative version of a genetic sequence at a particular locus.

Example: A and a represent two modeled alleles.

Alloaromadendrene

Named sesquiterpene related to aromadendrene; “allo” distinguishes a particular molecular arrangement.

Alloocimene

Acyclic monoterpene related to the ocimene family; not interchangeable with all ocimene isomers.

Alpha-bisabolene

Named hydrocarbon sesquiterpene in the bisabolene group; alpha distinguishes it from beta forms.