Pronunciation: (plī'ku),[key] —n., —pl.pli•caePronunciation: (plī'sē, -kē).[key] 1. Zool.,Anat.a fold or folding.
2. Also called pli'ca po•lon'i•caPronunciation: (pu-lon'i-ku).[key]Pathol.a matted, filthy condition of the hair, caused by disease, vermin, etc.
3. (in medieval music) a vertical mark attached to a neume, standing for an interpolated melodic ornament.