A bud is a condensed shoot in which the stem is very short, the inner leaves are closely
packed and the outer scale leaves form a protective covering. In the spring,
the stem elongates rapidly and the leaves unfold.
A bud at the tip of a twig is a terminal bud and contains the growing point; lateral buds develop in leaf axils along a twig.
The term bud is also used in zoology for a point from which new growth develops.