Category: P

The breastbone (sternum) together with the costal cartilages attached to it.  

A copy of the teeth and jaws made of plaster of Paris or dental stone (a type of plaster). It is used to study and record the shape of the jaws and position of the teeth before orthodontic treatment. When used as a base on which to make dentures or other appliances, it is called…

That part of the trophoblast that loses its cellular structure and becomes a syncytium. This is the invasive part of the trophoblast, which erodes the maternal tissues and forms the villi of the placenta.  

Describing a structure, such as a lens, that is flat on one side and convex on the other. An optical lens that is flat on one side and convex on the other.  

Describing a structure, such as a lens, that is flat on one side and concave on the other. An optical lens that is flat on one side and concave on the other.  

A type of cell found in the posterior lobe of the pituitary gland, similar in appearance to an astrocyte, with numerous fine branches that end in contact with the lining membrane of the blood channels in the gland. A modified branched neuroglia cell characteristic of pars nervosa of the posterior lobe of the pituitary gland;…

The laboratory procedure in which a part or the whole of the central nervous system of an experimental animal (such as a frog) is destroyed, usually by inserting a probe through the foramen magnum, in preparation for physiological or pharmacological experiments. Destruction of the central nervous system by the piercing of brain or spinal cord,…

The smallest bone of the wrist (carpus): a pea-shaped bone that articulates with the triquetral bone and, indirectly by cartilage, with the ulna. A tiny bone located on the inner front part of the wrist.  

A drug, similar to atropine, used to treat colic and other conditions involving spasm of the stomach and intestine. It is administered by mouth.  

A severe illness of children of the teething age, marked by pink cold clammy hands and feet, heavy sweating, raised blood pressure, rapid pulse, photophobia, loss of appetite, and insomnia. It has been suggested that the condition is an allergic reaction to mercury, since it used to occur when teething powders, lotions, and ointments containing…