A branch (American English , British English ) or tree branch (sometimes referred to in botany as a ramus) is a woody structural member connected to but not part of the central trunk of a tree (or sometimes a shrub). Large branches are known as boughs and small branches are known as twigs.
While branches can be nearly horizontal, vertical, or diagonal, the majority of trees have upwardly diagonal branches.
The term "twig" often refers to a terminal branch, while "bough" refers only to branches coming directly from the trunk.
A twig is frequently referred to as a sprig as well, especially when it has been plucked. Other words for twig include branchlet, spray, and surcle, as well as the technical terms surculus and ramulus.
Branches found under larger branches can be called underbranches.
Some branches from specific trees have their own names, such as osiers and withes or withies, which come from willows. Often trees have certain words which, in English, are naturally collocated, such as holly and mistletoe, which usually employ the phrase "sprig of" (as in, a "sprig of mistletoe"). Similarly, the branch of a cherry tree is generally referred to as a "cherry branch", while other such formations (i.e., "acacia branch" or "orange branch") carry no such alliance. A good example of this versatility is oak, which could be referred to as variously an "oak branch", an "oaken branch", a "branch of oak", or the "branch of an oak [tree]".
Once a branch has been cut or in any other way removed from its source, it is most commonly referred to as a stick, and a stick employed for some purpose (such as walking, spanking, or beating) is often called a rod. Thin, flexible sticks are called switches, wands, shrags, or vimina (singular vimen).
In Old English there are numerous words for branch, including seten, stofn, telgor, and hrīs. There are also numerous descriptive words, such as blēd (that is, something that has bled, or "bloomed", out), bōgincel (literally "little bough"), ōwæstm (literally "on growth"), and tūdornes (literally "offspringing"). Numerous other words for twigs and boughs abound, including tān, which still surves as the "-toe" in mistletoe.