Our ‘A’ to ‘Z’ of Gardening Terms Terms that begin with “J” Home/Glossary/Glossary-J FullABCDEFGHIJKLMNOPQRSTUVWXYZ TermDefinition jointA node; the place on a stem where a bud, leaf, or branch forms. juvenile stage(1) The early or vegetative phase of plant growth characterized by carbohydrate utilization. (2) The first stage of an insect’s life cycle, either as a larva or a nymph.