straggler

Webster's Dictionary (GCIDE)

1.One who straggles, or departs from the direct or proper course, or from the company to which he belongs; one who falls behind the rest; one who rambles without any settled direction. [1913 Webster]

2.A roving vagabond. --Shak. [1913 Webster]

3.Something that shoots, or spreads out, beyond the rest, or too far; an exuberant growth. [1913 Webster]

Let thy hand supply the pruning knife, And crop luxuriant stragglers.— Dryden.[1913 Webster]

4.Something that stands alone or by itself. [1913 Webster]