The practise of rapidly multiplying and/or regenerating plant material to
produce a large number of new genetically identical plants, using modern
laboratory methods.
Source: GreenFacts
More:
Depending on the species, some part of a plant such as a piece of stem, leaf
or bulb - is grown under laboratory conditions.
These sections of plant grow out to shoots, which can in turn be cut and
propagated. This may be repeated several times, so that the number of plants -
and thus the amount of labour involved - increases with time.
When enough plants are made, they are grown until their roots develop, they
are then hardened off and transferred to normal glasshouse and/or field
conditions.
