Category: P

The formation and development of hair. The creation and generation of hair.  

A condition in which the hair shaft is triangular in cross-section and often has a groove; seen in children with uncombable hair syndrome.  

A condition in which hairs are broken and twisted.  

The condition of ingrowing hair, especially in the beard area.  

The black pigment of the lamina vitrea of the choroid of the eye.  

A substance that destroys a pigment.  

Production of an electric current by application of pressure to certain crystals such as mica, quartz, or Rochelle salt.  

In ultrasound, a change of the mechanical action of ceramic crystals into an electrical impulse and vice versa. Discovered by the Curies in 1880, this phenomenon involves the deformation of a crystal when a voltage is applied across its faces. The application of charge induces the crystal to undergo deformation, and upon removing the charge,…

A device for measurement of the skin’s sensitivity to pressure.  

To penetrate body tissue, usually in order to place an ornamental ring or stud on the surface of he skin.