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A disease of the hair (Plica polonica), in which it becomes twisted and matted together. The disease is of Polish origin, and is hence called also Polish plait.

The bend of the wing of a bird.

The bend of the wing of a bird.

A disease of the hair (polonica), in which it becomes twisted and matted together. The disease is of Polish origin, and is hence called also Polish plait.

Certain condition of hair, occurring in little folds or bunches caused by fifth.

A fold of skin or membrane.

A disease endemic in Poland, Lithuania, and other parts of Northern Europe; so called on account of its being characterized by interlacing, twisting, and agglutination or matting of the hair. By some it has been regarded as a real disease; by others, as the want of attention to cleanliness. However this may be, it generally appears upon the hair of the head, but sometimes in that of other parts, as the beard, the hair on the axilla, pubes, &c. Alibert admits three species of plica. 1. Plica multiform'is or Plica caput Medu'sae, in which the hairs are mixed and agglutinated in greater or less masses; and this has been again subdivided into two varieties, according as the meshes are almost straight (P. C. M. lacinia'ta, (F.) Plique en Ianieres) or much twisted, (F.) P. en vrilles.) 2. Plica longicau'da, (F.) Plique solitaire ou d queue; when the hair is united into a single long mass, and 3. Plica cespito'sa, (F.) Plique en masse, in which the hairs are matted into one large, shapeless mass. Pinel places this disease amongst the Cutaneous phlegmasiae; but it is far from demonstrated, that it is the result of inflammation of the skin. Certain it is, however, that the tangling of the hair is symptomatic of an affection-sui generis-of the dermoid system. The idea that it is entirely owing to want of cleanliness, as has been conceived by some, is not tenable. It has been supposed to be produced by a fungous growth-a mycoderma or trichomaphyte.

Plectane- p. Cachectica, Plica -p. Caput Medusae, Plica -p. Centralis retinae, see Optic nerve -p. Longicauda lateralis, Plica- p. Lunata, Valvula semilunaris-p. Polonica, Plica -p. Polonica Judaica, Plica-p. Saxonica, Plica -p. Semilunaris, Valvula semilunaris.

Pl. plicae. A plait or fold

A fold; a convolution of the brain.

Of Riolan and Rolfink, a valve of a blood vessel.

A matted condition of the hair (see p. polonica).