plica

noun

1. 1.A fold or crease, especially of skin or other tissue.
2. 2.Polish plait, plica polonica, or plica neuropatica: a disease of the hair in which it becomes twisted and matted together.
3. 3.A diseased state in plants in which there is an excessive development of small entangled twigs, instead of ordinary branches.
4. 4.The bend of the wing of a bird.
5. 5.A neume, in the form of a tail at the end of a ligature, indicating an additional note.