Plica may refer to: Plica (lizard), a genus of lizards Capillaria plica, a parasitic nematode Plica (sigillography) - term from sigillography A fold or crease, especially of skin or other tissue, from medieval Latin plicare ("to fold") Plica fimbriata: Fimbriated fold of tongue Plica semilunaris of the conjunctiva Plica semilunaris of the fauces Plica syndrome of the knee Plica circularis, also called circular fold, of the small intestine The hair disease Plica polonica: Polish plait In early music notation, a note indicated in a ligature