Biennial - A plant that grows the first year and reproduces and dies the second year. Biennial flowers are often grown in a nursery their first year and sold the second year (when they flower) to be cultivated as if they were annuals. Biennial vegetables, for example, carrots and onions, are normally harvested their first year, before they flower. 

Bolt - To send up a flower stalk and go to seed. In leafy vegetables, this is usually accompanied by a marked deterioration in food quality. 

Cultivar - Cultivated variety; a subspecies or a particular variety. 

Deadhead -  It means to remove a flower after it has finished blooming. Deadheading normally encourages new blooming. 

Determinate - Of tomatoes, compact plants that produce their fruit all at once and then stop. A determinate growth habit is good for canning or freezing, or for growing tomatoes on a patio.

Fruit - 1. The developing or developed ovary of a flowering plant. In other words, if it contains seeds or can ripen, then it is a fruit. 2. The sweet, edible part of a plant.

Perennial - A plant whose life cycle is more than two years. The term "perennial" refers only to the plant's normal life cycle. It does not imply that a plant is cold hardy. For example, geraniums are usually called annuals because they die in the fall. However, if a geranium is taken indoors for the winter or grown in the tropics, it will continue to bloom for years. 

Pinch To remove the growing tip of a stem.  Also, the small amount of seeds one can hold between thumb and forefinger - a pinch of seeds.

Tender perennial -  A perennial that cannot tolerate freezing weather. Tender perennials are usually listed as annuals.  In colder zones they are either treated as if they were annuals or relocated indoors for the winter.