Category: P

A plane through the fovea of the eye; fixation point.  

A plane passing through a refracted ray of light and drawn perpendicular to the surface at which refraction takes place.  

Imaginary planes touching the same parts of the pelvic canal on both sides.  

The planes intersecting the axis of the pelvic canal at right angles. The first plane is that of the superior strait; the second that extending from the middle of the sacral vertebra to the level of the subpubic ligament. The third plane is at the level of the spines of the ischia, and the fourth…

A small, flat container or dish on which a radioactive sample is placed.  

Free-living flatworms of the Turbellaria class.  

To braid; to make separate strands of tissue into a ropelike structure (e.g., during tendon repair).  

A disk marked with concentric black and white circles used in determining the amount and character of corneal irregularity.  

Inflammation of the placenta.  

The use of human placental tissue as a source of fetal blood and hematopoietic stem cells.