wisp

n 1: a small tuft or lock; "wisps of hair"

2: a small person; "a mere wisp of a girl"

3: a small bundle of straw or hay

4: a flock of snipe

Wisp

["An Experiment with a Self-Compiling Compiler for a Simple

List-Processing Language", M.V. Wilkes, Ann Rev Automatic

Programming 4:1-48. (1964)].