What is the meaning of Plica?

A fold or crease, especially of skin or other tissue.

Polish plait, plica polonica, or plica neuropatica: a disease of the hair in which it becomes twisted and matted together.

A diseased state in plants in which there is an excessive development of small entangled twigs, instead of ordinary branches.

The bend of the wing of a bird.

A neume, in the form of a tail at the end of a ligature, indicating an additional note.

fold

a fold made in a document at the level where the seal is

synonym of piega (“plica, fold”)

liquescent neume

plica

second-person singular present active imperative of plicō

Source: wiktionary.org