Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «P»:
Post-menopausal: See: Postmenopausal....
Post-nasal drip: Mucous
accumulation in the back of the nose and throat leading to
or giving the sensation of mucus dripping downward from the
back of the nose....
Post-polio muscular atrophy (PPMA)
Post-polio muscular atrophy (PPMA): Belated muscle wasting that occurs as part of the post-polio syndrome (PPS), a constellation of symptoms and signs that appear late, from 20 to 40 years after the initial polio infection and at least 10 years after what was once thought to be the "recovery" from p...
Post-polypectomy: After a polypectomy....
Post-term: Overly mature, overly developed, especially as regards a baby that has not been born until well after the usual term pregnancy.
A post-term baby is one born 2 weeks (14 days) or more after the usual 9 months (280 days) of gestation. The gestation (length of the pregnancy) is calculated f...
Infant, post-term: An overly mature baby that has not been born until well after the usual term pregnancy.
A post-term baby is one born 2 weeks (14 days) or more after the usual 9 months (280 days) of gestation. The gestation (length of the pregnancy) is calculated from the date of the last menstr...
Post-thrombotic syndrome: The complications that may follow deep vein thrombosis (DVT). The complications after DVT may include persistent edema (swelling), pain, purpura (bleeding into the skin), increased skin pigmentation, eczematoid (eczema-like) dermatitis, pruritus (itchiness), ulceration, an...
Post-traumatic stress: An anxiety disorder that
develops in some individuals who have had major traumatic experiences. The person is typically numb at first
but later has symptoms including depression, excessive irritability, guilt (for having survived while others died), recurrent nightmares, flash...
Post-traumatic stress disorder
Post-traumatic stress disorder: A common anxiety disorder that develops after exposure to a terrifying event or ordeal in which grave physical harm occurred or was threatened. Family members of victims also can develop the disorder. PTSD can occur in people of any age, including children and adolesc...
Postcoital contraception: See: Emergency contraception....
Posterior: The back or behind, as opposed to the anterior.
For a more complete listing of terms used in medicine for spatial orientation, please see the entry to "Anatomic Orientation Terms"....
Posterior chamber: The space in the eye behind the iris and
in front of the lens. (The iris is the
colored ring of tissue that
regulates the amount of light entering the eye by adjusting the size
of the pupil. The lens is the transparent biconvex body in the eye
that refracts light. By "biconve...
Posterior cruciate ligament (PCL)
Posterior cruciate ligament (PCL): The knee joint is surrounded by a joint capsule with ligaments strapping the inside and outside of the joint (collateral ligaments) as well as crossing within the joint (cruciate ligaments). These ligaments provide stability and strength to the knee joint.
Posterior pituitary: The back portion of the pituitary, a small gland in the head called the master gland.
The posterior pituitary secretes the hormone oxytocin which increases uterine contractions and antidiuretic hormone (ADH) which increases reabsorption of water by the tubules of the kidney. ...
Posteroanterior: From back to front. A chest x-ray taken with the chest against the film plate and the x-ray machine behind the patient is a posteroanterior (PA) view. As opposed to anteroposterior (AP).
For a more complete listing of terms used in medicine for spatial orientation, please see the e...